Malicious PDF — malware analysis report

Static analysis result for SHA-256 13241baebab39a72…

MALICIOUS

PDF

103.3 KB Created: 2021-03-15 19:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: db14b3a65b0ed10863ae0542d316031a SHA-1: 985f8ab141e3e8dbe2774add436bd9a88db9aa73 SHA-256: 13241baebab39a721800590bd26bffe5b0bdbff13bb4424f3615b03a3c20ec6f
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 0.9997

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://leonvi.ru/strik?utm_term=chicago+style+in+text+citation+two+authors PDF link annotation
    • https://cdn.sqhk.co/damukowabij/ihgfbhd/werewolf_online_unknown_roles.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/pdf._js_canvas_vs_svgaek2a.pdfIn PDF document text
    • http://espacecmb.xyz/soundarya_lahari_telugu_raghavendra_raobttza.pdfIn PDF document text
    • http://j3vnci4.xyz/94680840432xytkf.pdfIn PDF document text
    • http://bunnygummy.ru/vijefolugu72daz.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwosexed/mjjggR1/synonyms_worksheet_for_grade_5.pdfIn PDF document text
    • http://ttttrrrr.space/bawulolilevizp2are.pdfIn PDF document text
    • http://mebel-albero.ru/govowipogidorirazokimutpyuv0.pdfIn PDF document text
    • http://usesoda.pro/how_to_start_learning_cloud_computing_from_scratchbh3oi.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/djejchb/stream_set_it_off_free.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/62711012328mht3j.pdfIn PDF document text
    • http://cmb-accueil.com/955313452364n2et.pdfIn PDF document text
    • https://libodarupebixab.weebly.com/uploads/1/3/0/9/130969674/gaxiwib-tiratarugoxu.pdfIn PDF document text
    • https://xuvetopugoseja.weebly.com/uploads/1/3/4/4/134484667/3943605.pdfIn PDF document text
    • http://depusapo.mypressonline.com/miveratodokuluk.pdfIn PDF document text
    • https://cdn.sqhk.co/zamodozitip/dhhihAK/14326353488.pdfIn PDF document text
    • https://jokiwaxe.weebly.com/uploads/1/3/2/7/132740814/tezazat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_55a1452102bc48e090e57846dc5b83e1.pdf?index=trueIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_0529c04697804dd28108ec2149836750.pdf?index=trueIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_024b9a826c8343cd95601540ac16e03c.pdf?index=trueIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_518acd3b953844a9b0655b79d45a09b1.pdf?index=trueIn PDF document text
    • http://sipanokule.onlinewebshop.net/john_deere_zero_turn_lawn_mowers_for_sale.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_off00015682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15682 5228 bytes
SHA-256: 1bc9f86696035de200d25e23c87fed1afc81299766e06b398c9ff66db49a1385
font_01_sfnt_off0001685b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1685B 11704 bytes
SHA-256: a160c27a72e8c5a52b2abf5a7d41dc769875ad0bfc05bd836cac70d200d96451

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