Malicious PDF — malware analysis report

Static analysis result for SHA-256 560b83021814bb77…

MALICIOUS

PDF

122.2 KB Created: 2021-06-28 16:23:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 58997a12de27d2997dc2384e45acc389 SHA-1: 9904d6d632c99a41c82c421767329457cfd94fd8 SHA-256: 560b83021814bb773b8559d8518915232a9b23814c0c8a825bc26029f206879f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it likely exploits PDF vulnerabilities. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9655

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://philabc.ru/uplcv?utm_term=your+mercy+never+fails PDF link annotation
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b0ef38dc291---podatib.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/22162873809.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/88f908942ab326e6655a684a1635adbc/ledenupafemixonomunej.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160829ec9a1234---33096582234.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/52652864094.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/27s9un69er0099sdea0rh6t1s7/16998935073.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/10716508069.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160d0cccdd9bba---85221168595.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa6a50eb0f---fizewemitedaweka.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/1g10p7iu9hicoigsm9pgvbr5ln/xaxewafobudejeb.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/vofuvetipunoz.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a3298d43d---riviruzari.pdfIn PDF document text
    • http://ipceurope.com/assets/file/97531468502.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d331539e84---2850559704.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/3505660542.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076337041b18---zeponimiv.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/derupesofevexoji.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607fded31f3e1---jusir.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/9403032289.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16071e5f757d45---pajagebapiwakajewosaze.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/40525368000.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f95fc426f---84110824829.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/9ae850b1d507f8bfba446f6d165ec350/25132959031.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609277b7205df---90070145213.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6ab554f58---fawavoligasefinuxisi.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/1c258ea536d0a2b30f024b52432f44c8/zuxixofinoz.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/30f48dd3808dec7c09e5c16c30a264c1/93935710010.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000159e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159E8 19660 bytes
SHA-256: f69465588d53f3867733a9a478d7eaa555960f6fe0d101a86fc661ac98a614ee
font_01_sfnt_off00018b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A326 18352 bytes
SHA-256: d4c8d36c5f8ec3f24f963b2670218e941583a74d7ad1b6716b1f59e48f3f2d54
font_03_sfnt_off0001c0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0C1 10660 bytes
SHA-256: 84f51c82e78f88e0054895ecb65f9a017faf334ff59dc705bc2d70bcfd141848

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