Malicious PDF — malware analysis report

Static analysis result for SHA-256 932ac5d2530175e2…

MALICIOUS

PDF

74.4 KB Created: 2021-03-18 05:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 72d189725ddb16982f3f252cd2335ac3 SHA-1: 9e9e9e1a26929c79cba90b5bf6c9bd4a32b327b8 SHA-256: 932ac5d2530175e2af13b5153975beb4ff0c71e8a733643c6f0fff941be9b8a4
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/123?utm_term=red+cross+lifeguard+cpr+test+answers PDF link annotation
    • http://karaulovlife.site/andreas_moritz_books_freexm9bn.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/0Vwp1DS/74535595379.pdfIn PDF document text
    • https://cdn.sqhk.co/baziwuwe/a1NZ5aY/hayrides_near_me_2020.pdfIn PDF document text
    • http://detonic-romania.website/47266642635zs5xn.pdfIn PDF document text
    • http://peskomment.ru/little_red_riding_hood_characters_clipart4ljpm.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/3ienhgu/stampede_blu_ray_release.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/agilent_34401a_user_manual.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/59886159-2329-43e4-a48e-4b2b57b8ca6d/puvup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e321bec0-39ae-4736-8d6d-a11809b60677/hp_laserjet_p1006_printer_toner_replacement.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/1868021268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b001033-9aeb-43ab-aad8-490562bd198d/how_to_change_a_timex_weekender_watch_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/kixujukaporibubezumeziz.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/16647824741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eff8b80-2c5c-4fa4-9b8e-313cd2ba215f/kaviledut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa0d95cc-93ca-4253-9bac-e1d97daa1ddf/8585996997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebde83d3-91c4-433c-b1b7-8cad682bba1a/35861313210.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/guide_gravures_progressifs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb518432-cf12-4fab-8e90-2eccce5e029c/28895441984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5572e759-b729-48e6-90c0-35c591ac0d91/where_are_beretta_m9a3_made.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_off0000e54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54C 5424 bytes
SHA-256: 5232f13fd08eacc9c4932ace9081410f39cadfbfea0805700bc48964f1f2cc7f
font_01_sfnt_off0000f7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E9 10748 bytes
SHA-256: 9cf299195b73c63abf4c86d2829630ed6eb8bc88602112c0841c838c3ccded5b

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