Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1bc815e5d88db4…

MALICIOUS

PDF

77.8 KB Created: 2021-03-25 22:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ab4c0f6423ca38f710fdedeb084c6d0b SHA-1: 102f161d149373d7b6f70a256952db1078e36fb3 SHA-256: 4d1bc815e5d88db46810e032f4a6cfdc95ff25275c2fd98bb95c4801292affae
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://mezovuduw.ru/123?utm_term=android+17+t+shirt PDF link annotation
    • http://pufujijixupoxo.iblogger.org/1239965341.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/gjGjesi/tixitib.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/je8Fhee/hyperspin_nvidia_shield_tv_setup.pdfIn PDF document text
    • https://bebibamo.weebly.com/uploads/1/3/1/4/131438385/bepatupibezero.pdfIn PDF document text
    • https://waforavorodi.weebly.com/uploads/1/3/4/3/134314120/8604432.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/IgeMEVl/edge_of_oblivion_alpha_squadron_2_apk.pdfIn PDF document text
    • https://kagukemo.weebly.com/uploads/1/3/4/8/134884413/6060206.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/hjhpgdj/best_rechargeable_vacuum_cleaner_for_car.pdfIn PDF document text
    • http://idealica-italiaoficial.site/aashto_lrfd_2017z5wob.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://bonifacy.site/57617031355t5ui9.pdfIn PDF document text
    • http://momentikshop.space/manual_de_funciones_senativu9w2.pdfIn PDF document text
    • http://50offshop.info/zufadematokimagbmriv.pdfIn PDF document text
    • https://cdn.sqhk.co/gabunufu/dEFggi4/download_game_shoot_hunter_survival_war_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zafipuzekamezu.epizy.com/49652104871.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/adverbs_list_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf8fc16-9336-4124-9e3a-f60bcb774174/litisumabirekulikazefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78839dcd-0e12-4a1e-9303-7758b582b2e2/nogexukomo.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/free_imagenomic_portraiture_2._3_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc49310-71ba-4cef-8a74-4d0f0d2ccdfe/compra_la_verdad_y_no_la_vendas_explicacion.pdfIn PDF document text
    • http://pewubep.rf.gd/star_wars_piano_sheet_music_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/271d9fde-5361-400f-8dd8-ec49629fe42e/mere_christianity_cs_lewis_kindle.pdfIn PDF document text
    • http://tiwawaja.epizy.com/77612426394.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/gevaxelixegijosibunil.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_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 4792 bytes
SHA-256: 84e76cb445fbca75c33a0d931dd6f2a5282de9575ab4b31fb75c4d38fa08443d
font_01_sfnt_off000102fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FE 11600 bytes
SHA-256: c85ff14995006285b815a43a97d340d155e67dccc2f6a355ff5ec6c3db034780

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