Malicious PDF — malware analysis report

Static analysis result for SHA-256 139881927fb8c02c…

MALICIOUS

PDF

72.6 KB Created: 2021-03-21 07:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 31a2e801862537ee5d5aa80f3a3154d1 SHA-1: 57583f6be3578baf24ec139a86818ea8c92c4a6b SHA-256: 139881927fb8c02ce2ed0594a5b6c0e2ada77f28bd70b30a939d2f5d0df09415
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 0.9998

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://lozipotod.ru/wix?keyword=respawnables+heroes+apk+download PDF link annotation
    • http://soldatskaya6.ru/duraflame_20-inch_infrared_electric_fireplace_insert_log_set_-_dfi030arue72t4.pdfIn PDF document text
    • http://suzupuwejal.mygamesonline.org/gallbladder_stones_diet.pdfIn PDF document text
    • http://checkmycredit.info/lenguaje_corporal_de_los_gatos_siamesesi9zfj.pdfIn PDF document text
    • http://lerimofo.mywebcommunity.org/59085870890.pdfIn PDF document text
    • http://haifaiv.ru/bissell_poweredge_pet_vacuum_81l2auuzq1.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/busilodazenuxuwegu.pdfIn PDF document text
    • https://totobulamu.weebly.com/uploads/1/3/4/3/134310137/valekifosageto-bipom.pdfIn PDF document text
    • http://mmeueue.space/bad_piggies_keygen_activation_keyspdtwi.pdfIn PDF document text
    • http://wiinorama.fun/32339467217u6i6.pdfIn PDF document text
    • https://zufikuwokuz.weebly.com/uploads/1/3/4/5/134522796/651620f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xatopuwapapifo.epizy.com/54483218843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93cc52d-13d2-448c-8ae9-db8373dc2d93/nakemesuworo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d849727b-5db6-44f2-bd8a-60055dd2b13e/kopawut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efb4d30-2455-4868-9879-6f853d4204b8/ridgid_miter_saw_stand_assembly.pdfIn PDF document text
    • http://vadowudikimaj.epizy.com/30110995599.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/divinity_2_definitive_edition_party_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/fejinugizaraweb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e191d906-192d-4057-be3c-8e9b777527ad/13751804704.pdfIn PDF document text
    • http://besasasef.rf.gd/hard_algebra_worksheets.pdfIn PDF document text
    • http://mutebazi.rf.gd/taxutivajidi.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_off0000dc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC69 5352 bytes
SHA-256: cb2081012ac5171bf328fa11df825dabf8e44999b007052d8ac84b95d6b79448
font_01_sfnt_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 10952 bytes
SHA-256: 63e230350f09c6d204d05b771db04a4965cb32c15f406a5666d8d9588c686c5b

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