Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd0a4b9c9c03d7b…

MALICIOUS

PDF

75.8 KB Created: 2021-03-06 09:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f98b68937358ff6c4da956b4f1e1812c SHA-1: 11b86953292366155ca61c45ec064c37bd243357 SHA-256: afd0a4b9c9c03d7bd88e3fa50fbd4292eb6ecfadb8e46979508e874c56441003
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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/123?utm_term=moon+of+my+life+my+sun+and+stars+full+quote PDF link annotation
    • http://oneitstore.pro/o_saki_saki_movie_songsdvbat.pdfIn PDF document text
    • https://cdn.sqhk.co/mamidusidozu/f0NN5RC/minecraft_world_map_download_1._16._1.pdfIn PDF document text
    • http://rocketdocs.us/effect_of_caffeine_on_plant_growthi2ed8.pdfIn PDF document text
    • http://redirunna.xyz/sscnr._net._in_answer_key_2019xh3ln.pdfIn PDF document text
    • http://finofoze.22web.org/zixamuvi.pdfIn PDF document text
    • http://tuvuvadirozo.iblogger.org/losukovegedaxisu.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/00KhzsK/nodeluzamasefebejubije.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/a89000d0-2862-4c31-af75-cda6840e33e8/hp_computer_beep_codes_list.pdfIn PDF document text
    • https://f538c46d-6aff-4997-95da-320e40b30403.filesusr.com/ugd/262ba4_bc190c9e4bac4d4f98811a3375b29ef0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/306d327d-5179-424f-b37b-1761cfac7c9a/how_to_draw_eyes_simple.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_e13c4f06829a4a07be81d89c76287f0a.pdf?index=trueIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_d2c5f229e97247329ad59a159c03b5fe.pdf?index=trueIn PDF document text
    • http://tevimumuto.epizy.com/kenneth_hagin_youtube_videos_healing.pdfIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_d5a8754f69084d55868aab189f693e2c.pdf?index=trueIn PDF document text
    • http://gifadapilara.epizy.com/xejesekiremelavuz.pdfIn PDF document text
    • http://mafefelanepule.epizy.com/87461933580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b34ce8a8-7062-4fc0-bbed-58dbd231bca5/tc_helicon_harmony_singer_manual_espaol.pdfIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_56d1e259c66c41b08a4fc738224a3bcc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/405d1125-1a2d-4cf3-b70a-cba416ce7c40/2013_highlander_oil_reset.pdfIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_93f24231901948e3be41a5876a69fcea.pdf?index=trueIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_45e354d849324abeb9e94bdadb7fdfe6.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8D 5284 bytes
SHA-256: 5a0413902e45b5dee36e828feca11ad14047ca94c5de13d3f4112c5a2f1d203f
font_01_sfnt_off0000fc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7F 11064 bytes
SHA-256: 6ee8a7a9b995cbd96fdd25cd3484ed8825a23c786a69c22471fef89e2943266d