Malicious PDF — malware analysis report

Static analysis result for SHA-256 e782101a62f4fb9c…

MALICIOUS

PDF

108.0 KB Created: 2021-09-06 03:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6e76ec77a98ac26b7061f86a0f0876e3 SHA-1: d0a002aa28c41efdedc415c862998d10e2a10665 SHA-256: e782101a62f4fb9c9cdfd95057a8453c38612fdc94eb623b1aa61879b9226ad6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a link farm pointing to multiple domains, some of which are hosted on compromised WordPress sites or appear to be disposable. The embedded JavaScript likely facilitates the download and execution of a secondary payload. The heuristic 'SE_ENABLE_LURE' suggests the document may also instruct the user to enable content, a common tactic for malware droppers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

Heuristics 8

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://laserinnsbruck.com/static/gadukeduzamovivume.pdf In PDF document text
    • http://gtlmarinefuel.com/userfiles/file/rigisakebejefubibizo.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/98543728070.pdfIn PDF document text
    • https://soechi.net/userfiles/file/tupiwofoxeseju.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/5706d4cdff420796bcc1442e4daba3fc/12601061434.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/409fddcaf93dedcb69148d62df7ed63e/52688084554.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/4f89dfac97754fa3d6b5f79e6539ab46/kumurekodozi.pdfIn PDF document text
    • https://tndvn.com/js/ckfinder/userfiles/files/jidubanorodugezorutobowi.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a601bd071d9---letadoxikovipefikiboxuv.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/fiwovakuzemafam.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/binezaxejipapezivagurak.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/77507838960.pdfIn PDF document text
    • http://zuche0551.com/upload/file/74659720795.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/botapizujalifiturixega.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bb3fa8974---rokoloxar.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1609b753d818b9---49516111081.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/jopizegikusiz.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/712bcdb987acdd02dde6d6ae6c8b2fd2/67118287682.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/2c8483d8447c8b9ce5ba6481af1ebeb9/wifapogod.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/9797009239.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7d2e1a27a---55397607095.pdfIn PDF document text
    • http://stattus.com/assets/file/diguboku.pdfIn PDF document text
    • https://cartolmania.it/file/remesakodigi.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/rowozakutivupimiwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=hairpin+heat+exchangers+explained+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001271c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271C 18944 bytes
SHA-256: 67dcba44403d33faed38ac9da186b0be1053ab8ad1e3b36bf738adeb1cd389b6
font_01_sfnt_off0001581e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1581E 10872 bytes
SHA-256: 3132a9b853ec26bf340ab4525c8f3833ad21657911922b705983372fad209823
font_02_sfnt_off000170e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170E9 16920 bytes
SHA-256: b3c462f70becf758b74790427ce88f98d309c5d3d9f6c04c47214bd3253e6206
font_03_sfnt_off0001896f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1896F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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