Malicious PDF — malware analysis report

Static analysis result for SHA-256 082cc0611010083f…

MALICIOUS

PDF

83.5 KB Created: 2021-09-03 03:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 194c6ba12b5ea37bb2907a96dbf0be55 SHA-1: 19250a7cb43dc0fc806e41c4a432efca379de6b7 SHA-256: 082cc0611010083f32ac758c398e0e7c598bd033859e163b989eaadde6e0481c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised CMS upload directories, suggesting it's designed to lead users to malicious content or further exploits. The presence of multiple external URIs and link farms on disposable hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d2eb0fb39---76386851411.pdf In PDF document text
    • http://kaies.cn/upfiles/file/71992005992.pdfIn PDF document text
    • http://hoggard1975.com/clients/a/a4/a43fc1111b7ad4318f8b553feb79a890/File/61248705972.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e31eeb119e2---xipugewefoxug.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/kebobobelidorixajomovis.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/50011268161.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/99862923834.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/17pu9nlm5chhj63c0gu3kl4hl5/jinebutijokoloxe.pdfIn PDF document text
    • https://cubic.is/userfiles/file/613124888.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/1519358261.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/d28c37d0db72c44f133b48cca1d1890b/sozoxagevaresejenepam.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/tanifalawekamasofolak.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/pepozufirawaluxarureputef.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc30548cce1---linizigodozopapifawataja.pdfIn PDF document text
    • https://goldgreiner.de/userfiles/file/vurepane.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/78151191108.pdfIn PDF document text
    • http://phamtrangia.com/upload/files/kexaluvunarumofuxajef.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8587e00b08---23752928025.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/23006413499.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/80e31862adb29f875a5395daf9ab7d22/72327570668.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d6e41af19---81602199373.pdfIn PDF document text
    • http://juentai.com/userfiles/files/75656036091.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/zasobogawamawatefoni.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16091fe298dd26---69933758065.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/ludoludiduwa.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/7111427999.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=azolla+filiculoides+pdfPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B7 17960 bytes
SHA-256: dbff6b01d5fab8855583d1f1e2537a0b8b3835b7cbf7bb25c69fcdf958ae415a
font_01_sfnt_off00011034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11034 10452 bytes
SHA-256: b720b34696f47955c18a8d8b9c96d28357803c095505f7b1a01f02454df61c1a
font_02_sfnt_off00012822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12822 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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