Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae88eb36d9341e4…

MALICIOUS

PDF

77.4 KB Created: 2021-03-13 19:48:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7ce1cef5f5765825f3ef7e3d4f5bdb42 SHA-1: 9e895b3765e944f0f1899a07f970f26b397c2d8b SHA-256: fae88eb36d9341e478211737c87e20cc865f73c070b26d4007c5e6e5c8a19586
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/wix?keyword=2001+ford+mustang+v6+manual+transmission PDF link annotation
    • http://busimaderule.mywebcommunity.org/tijuv.pdfIn PDF document text
    • http://helpcreditscore.info/punuzitaxerpxvh.pdfIn PDF document text
    • http://keto-menu.online/pepper_iron_man_suithjmus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489843/normal_5fd6a0562ccad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413118/normal_5fc9447626eb2.pdfIn PDF document text
    • http://dofuluxaruze.22web.org/tozibul.pdfIn PDF document text
    • http://kojurebajalafaw.22web.org/notepad_free_for_windows.pdfIn PDF document text
    • http://potoborotagivud.22web.org/the_psychology_of_color_in_film.pdfIn PDF document text
    • http://dostafood.xyz/florence_scovel_shinn_affirmations_for_wealthutaxd.pdfIn PDF document text
    • http://gasiwine.iblogger.org/33655906927.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/7518771327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f64218c-75b0-4c75-b720-f1ac95eb2dc2/polaroid_sx_70_repair.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_40ab712f97ef435ebfac1c3e9512597c.pdf?index=trueIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_6818625f06fc46c1add643ac3b08d7a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8730a8a-2e08-4e9c-bf6f-75996a34fd70/83454904443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc2ffab6-93f4-437f-b89d-e110edb04057/insinkerator_hot_water_tap_only.pdfIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_6b366e86049f433aacd34bbf95d840cf.pdf?index=trueIn PDF document text
    • http://zalezir.epizy.com/77067484255.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 5672 bytes
SHA-256: 8c33862f3ca98909b51018f58990fe0bdd5b23f92310c7005604b48c389a5ee0
font_01_sfnt_off000103f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F8 10676 bytes
SHA-256: d540514d94b08ca3ce18690cd755c9f0cf4ebbf2708cb726c3d80771aab7b112

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