Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9f4a350fe842cb…

MALICIOUS

PDF

93.1 KB Created: 2021-03-27 20:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fa3f364cc8aa618eeadaee472e1ef21f SHA-1: 5069146e3af4026c1b5a412cf16e2d914818d6b8 SHA-256: 7d9f4a350fe842cb9c873711951950b4bb533689b4cf6204af43475f76c95d01
244 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, employing a link farm to redirect users to external sites. The embedded URLs, such as 'https://midufefew.ru/wix?keyword=crack+photoshop+cc+2015+amtlib.dll', suggest an attempt to trick users into downloading potentially malicious software by offering cracked software. The extensive link farm, with numerous links pointing to various domains, is a common tactic for SEO poisoning and distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • 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.
  • 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.
  • 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://midufefew.ru/wix?keyword=crack+photoshop+cc+2015+amtlib.dll In PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://domotoj.sportsontheweb.net/galabobubili.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/2gM9Wgj/97312920490.pdfIn PDF document text
    • http://christmas-gift.ru/how_to_look_up_dunkin_donuts_gift_card_balancevhkd7.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/gcgdggU/makofavezedeke.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/worx_14.5_amp_electric_chainsaw.pdfIn PDF document text
    • http://educationonline.website/94810486436dn9dz.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/74720660320.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/pifEOMG/2020_mastercraft_x24_review.pdfIn PDF document text
    • https://cdn.sqhk.co/gawisibiw/fjjxief/mini_snake_plant_propagation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gamelaluwer.myartsonline.com/cable_tray_design.pdfIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_e18acca573bb445f8c3d11b03738f214.pdf?index=trueIn PDF document text
    • http://nabenejajoko.myartsonline.com/72132388542.pdfIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_6406663516e64ecdbfd26d50bc4ca099.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_6df7c98804dc426cb1fbca5309f5eae4.pdf?index=trueIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_dda37dd1799a4150906aa39749bed34f.pdf?index=trueIn PDF document text
    • https://b9387e75-0942-48a6-8a47-0bd3f0224277.filesusr.com/ugd/fc485c_b5c644d60f1b44738999788ddb0ff257.pdf?index=trueIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_18ca53e1f7384927830997ec43e0710e.pdf?index=trueIn PDF document text
    • http://pikubub.onlinewebshop.net/bacterias_unam.pdfIn PDF document text
    • http://lanosebezazov.onlinewebshop.net/did_the_handmaids_tale_win_the_booker_prize.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_6cbeac33492d418eb64236f7274a24c5.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5ED 5684 bytes
SHA-256: 21c3f5201ab5458eb1c2998119b950de9f190f0d9822f1731880423c908d764e
font_01_sfnt_off0000f9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C7 5588 bytes
SHA-256: b460fb90a3b802282fd921f41ee2c31ef81ef0f0d2c339d733af0c4219afd4a8
font_02_sfnt_off00010cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBF 23288 bytes
SHA-256: 013a9bb6f84fe3a5aa47955d7c8209f2c755140cb8317a6664ef557fe4a5969e
font_03_sfnt_off00013fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCB 16488 bytes
SHA-256: a24b379294965881213f6bc3e9db9f5314a2d8a06b10cd027b2e5f3c9ddd95e2
font_04_sfnt_off00015659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15659 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378