Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a92030731d0f5b…

MALICIOUS

PDF

78.4 KB Created: 2021-03-23 09:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 32e401b875028d48b2b8e58b78ab5e10 SHA-1: bd4c7a487caa004d540cece9c7c7de2c269e10e0 SHA-256: 76a92030731d0f5bd213d7107eeaa2d47ad30328a2400c3510636ce3992c580b
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one pointing to 'lozipotod.ru', which is flagged as a suspicious domain. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a phishing or scam attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://lozipotod.ru/award?keyword=the+latest+research+ai+and+machine+learning+pdf PDF link annotation
    • http://bestunew.xyz/cabify_conductor_app_iosg3mby.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367914/normal_5fcff3a5043a0.pdfIn PDF document text
    • http://liketime.online/dodge_dakota_parts_catalog90nax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_602406297a764.pdfIn PDF document text
    • http://youtube-subscribes.com/futuro_semplice_italianoas3fc.pdfIn PDF document text
    • http://white-x.fun/53629108151x51v0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458161/normal_604cd1ac08b90.pdfIn PDF document text
    • http://afracheat2.xyz/need_for_speed_most_wanted_pc_modsmp9xq.pdfIn PDF document text
    • http://natfreshik.fun/94702079874mqybw.pdfIn PDF document text
    • http://5coupon.info/guzigaburetomejm5oa.pdfIn PDF document text
    • http://xsafak.com/signos_de_kernig_y_brudzinskisxpub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_6011ded2ce29e.pdfIn PDF document text
    • http://digitalcalakk1.xyz/materials_selection_in_mechanical_design_5th_edition_solutionsnmu3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_e440788fb26c4d0994be7ecc5b39d06d.pdf?index=trueIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_d1662d6f1fb24b9b99ee6771a727152a.pdf?index=trueIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_8ae523cb7c4542ba961000ea982afb2d.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_c024ea41a8304209a5337e93f61e4f47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/jatifovufowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efa7ff8-c50f-4e84-9746-973c71838e26/what_is_the_keyboard_shortcut_for_a_screenshot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f8e5cd9-9411-46fa-9c28-5c0675636ed3/puxiremigola.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/70779716224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47467a4e-7b62-4a6c-a688-9702a18606fe/how_to_use_qcy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc7e0dd1-68cf-4146-b0bd-4b271181fbd7/tl-wr841n_v10_firmware_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52acbcbf-61ed-4b30-9af4-badc9c10475a/how_to_get_child_support_raised_in_michigan.pdfIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_ba03fbbfb95a49b18808216edc534b4a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pukiza/86300275932.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_off0000f4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BC 5516 bytes
SHA-256: 72e0db755c1700ef3faa28020dec6ba0f3ede1a8d9ea8ec968b1c2e0797c2bd7
font_01_sfnt_off00010752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 10572 bytes
SHA-256: 610a9b3dd6028fb6bb4ef430e3a5dfdaa81878db54c6a45e1ff5f3d6a4d2ddc0