Malicious PDF — malware analysis report

Static analysis result for SHA-256 429288d0dcea71e5…

MALICIOUS

PDF

89.6 KB Created: 2021-03-15 12:37:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 058efa089a84cdaa5a92c37e99d8a5e4 SHA-1: 27fa79a717bca48378714e0abf79fe35c7d50f78 SHA-256: 429288d0dcea71e50199059e18fa7cbccb6476c5f18fb4b43761bcb2a56b1d6e
134 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=google+classroom+newspaper+template PDF link annotation
    • https://cdn.sqhk.co/bisuligiga/qMhfohj/original_galaga_arcade_game_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/r2gejid/99188390681.pdfIn PDF document text
    • http://majofakidujuna.22web.org/4961418239.pdfIn PDF document text
    • https://cdn.sqhk.co/xovijanovupu/egg1gj5/ionity_charger_map_europe.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/gtjfBEp/19853302238.pdfIn PDF document text
    • http://tokigarodam.22web.org/backflip_madness_free_full_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_23eb80bfcb134f13b82dd786424035a0.pdf?index=trueIn PDF document text
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_e961ab09edf143f2a7552286315be7e4.pdf?index=trueIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_c274f98af6784f3e87ad1190cb5fb6bf.pdf?index=trueIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_2136a3f6ee0b4701b45c2d5d3df8fb54.pdf?index=trueIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_d54438d72aa5413e938309a227a87603.pdf?index=trueIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_51d4120ba4a84fad8bc0001e51df221a.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_fd1716b1c902483ab58eab06089e6650.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zagubip/allen_bradley_rslogix_5000_tutorial.pdfIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_704697f7417b4558b471ca94384edf85.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fopalew/pajama_friends_ep_10_eng_sub.pdfIn PDF document text
    • https://d572dbd6-ec42-402e-884a-3db6daac2318.filesusr.com/ugd/6a558d_ffbc252b8b5640bbbb2afd9f293e94fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/flying_car_3d_game_apk.pdfIn PDF document text
    • http://divejekojo.epizy.com/why_my_dishwasher_does_not_start.pdfIn PDF document text
    • http://bodapefazit.rf.gd/safety_casters_chairs.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/lolubifesutujemugawexom.pdfIn PDF document text
    • http://xelidamos.epizy.com/gokagatafun.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/tenipigebig.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/latamefepivozofujeve.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F6 5376 bytes
SHA-256: d99a506363b60926717c88a1aad8ffe16bc9d743e06c40d583b4235c028973ea
font_01_sfnt_off0001283e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283E 2504 bytes
SHA-256: bda46a189ab5ca82e9a2dfbdd44eacc5857f8d08cd207523bdafa5b6a969d3e3
font_02_sfnt_off00013321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13321 10488 bytes
SHA-256: bf09f65e16842e606dd991ae308af00f55a26b14a2596d4eb427ed924eff3b39