Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11f7d0e9ca146b8…

MALICIOUS

PDF

82.3 KB Created: 2021-03-18 14:26:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d318aca3874c36c6987afe14e1206e2e SHA-1: 336b836483d0fbfd568d3312b1d5c1ec7abc9e0c SHA-256: e11f7d0e9ca146b86a52754381ae5a96b5f7e1055dbacc231b61d3ab27dc7fce
126 Risk Score

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 0.9954

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://nipisod.ru/wix?keyword=ice+cube+death+certificate+full+album+download PDF link annotation
    • https://xanusikufugab.weebly.com/uploads/1/3/4/3/134371049/8171617.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/pride_and_prejudice_cast_darcy.pdfIn PDF document text
    • http://tukatasepos.iblogger.org/the_wave_arizona_location.pdfIn PDF document text
    • http://vobajujabu.mywebcommunity.org/vurepusemep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_60264e66e8174.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368493/normal_5fca6d92e02b1.pdfIn PDF document text
    • http://wawimetuboze.iblogger.org/ribajemujusovajepabisilo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379987/normal_5ff408d53f9e9.pdfIn PDF document text
    • http://wewazer.iblogger.org/stewart_redlin_watson_precalculus_7th_edition.pdfIn PDF document text
    • http://tapasin.sportsontheweb.net/kriya_yoga_initiation_uk.pdfIn PDF document text
    • http://rubolanir.mypressonline.com/millermatic_135_parts_diagram.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/the_salt_fix_how_much_salt.pdfIn PDF document text
    • https://pedamajemekiju.weebly.com/uploads/1/3/1/3/131380885/8616011.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/pewunidaviwewegako.pdfIn PDF document text
    • https://naratejog.weebly.com/uploads/1/3/2/6/132682615/mofixisojuzidikir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vonanovab.epizy.com/31413983883.pdfIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_cc4ce85780a64ce4b04f762d93ad0774.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6223dfc-f625-47c9-9d6b-54fb92347f78/graco_lauren_crib_guard_rail.pdfIn PDF document text
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_49ec5c5e9a3b484f9a572a21704c2f3e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab20c9ec-d20f-45ba-867a-d4b6e4657af3/woxinod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59f367b8-6a54-4f51-9f38-dcf1766fa54c/how_to_make_a_g5rv_antenna.pdfIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_96a10cc5f5054fcea427fc14ee23a7f9.pdf?index=trueIn PDF document text
    • http://pekuruzaxi.epizy.com/roblox_shirt_template_transparent_background.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f42fb2-95bb-4cf8-b46c-50cfb06c3255/chamberlain_whisper_drive_plus_instructions.pdfIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_cbcaab9703e3493f8c7e552fce726f2b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f10fc0-facd-471f-ab45-2a4ce2f8ebd3/36797141752.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_off0000ed54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 5624 bytes
SHA-256: 94c9fdb5bfe55c499c9b170eab6258f9d4398b7f55723fd5607109fd02a07508
font_01_sfnt_off000100b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B3 5252 bytes
SHA-256: 07b5e83bc5c3672226a6882dfe97d2946913a3ec33ff92c89fe556dabb9e2ae7
font_02_sfnt_off00011271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11271 11392 bytes
SHA-256: 49355d798a98e2a32cd395674e4af8cd870cfc94e482b59943e720080e933b2b