Malicious PDF — malware analysis report

Static analysis result for SHA-256 124d1363a4cda2c5…

MALICIOUS

PDF

132.9 KB Created: 2021-02-14 19:09:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bb3857913f184810d3d317c8b6a3b24 SHA-1: 2e13efbbd5300b9fdfe60f225b9d2458af258f0d SHA-256: 124d1363a4cda2c5ca5299c8bf4bed163ddd148e1c3df8a636a70f0a082323a6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, flagged as a link farm, and is identified as a phishing/trojan by ClamAV and an ML classifier. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests a scam, likely involving fake prizes or parcel delivery, to trick users into clicking malicious links. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://druttle.ru/wix?keyword=neox+spain+tv+guide
    • https://lutigasudubuwa.weebly.com/uploads/1/3/2/6/132695203/6688336.pdf
    • https://static.s123-cdn-static.com/uploads/4415309/normal_5fc5d26b8fb05.pdf
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/8431482.pdf
    • https://static.s123-cdn-static.com/uploads/4495395/normal_5ff71c553bf11.pdf
    • https://cdn-cms.f-static.net/uploads/4448743/normal_6011272bdf2ce.pdf
    • https://sobomevoza.weebly.com/uploads/1/3/0/7/130739746/sekafugogedogir_niletot.pdf
    • https://static.s123-cdn-static.com/uploads/4412758/normal_5ff18101a82a0.pdf
    • http://topshops.website/vizedejotowivezemopivkhtm.pdf
    • https://static.s123-cdn-static.com/uploads/4485448/normal_5ff2722ab169d.pdf
    • http://artyom.guru/driver_acpi_ven_hpq05ktm.pdf
    • https://static.s123-cdn-static.com/uploads/4379844/normal_600902bbb68d8.pdf
    • http://forkidsshop.online/water_bottle_label_template_psdw1fwk.pdf
    • https://static.s123-cdn-static.com/uploads/4416659/normal_60096a11bd67d.pdf
    • https://xikewipevugid.weebly.com/uploads/1/3/1/3/131383679/7107840.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://riwexakax.epizy.com/99130445553.pdf
    • http://tupusivamiguta.rf.gd/nefizuvububinotigoxinaf.pdf
    • http://favekagopu.epizy.com/17969154703.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d0d5.bin
8fbca2c440102c5994056babbfdaa2c20beeb3c49d02f2d0f7cb68bcfc204221		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D0D5 5096 bytes
font_01_sfnt_off0001e24e.bin
cbb66058a5fc6ec1a9cf079ff80d6e31878309ec57507a20d8aac23a283fa278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E24E 10576 bytes

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