Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb939554a27f3c45…

MALICIOUS

PDF

117.8 KB Created: 2021-03-06 01:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cb2a06a73fb0c3793f9ea05a5729d7e0 SHA-1: 59aa3158b027d7eab055875cab92268e90f59c2e SHA-256: fb939554a27f3c454115d9e95b0919ea60bec7354890f078b528aa597b173112
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 0.9994

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://bologen.ru/123?utm_term=hyperbole+and+a+half+dinosaur PDF link annotation
    • https://cdn.sqhk.co/folamudoj/jowzidn/9386523131.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/e2iiiau/baby_yoda_ornament_diy.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/beggi0E/79438451687.pdfIn PDF document text
    • http://reduslimitalia.site/worksheet_math_grade_126ubtm.pdfIn PDF document text
    • http://luchdobro.site/44172262308h3j6j.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/6UF6je7/94034391775.pdfIn PDF document text
    • https://cdn.sqhk.co/ropimipaf/epgiPgj/lighthouse_point_park_florida.pdfIn PDF document text
    • http://ru-order-687646765445.art/86492064140g45lf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502563/normal_5fd1e2dcb803e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370764/normal_5fccec4e3b571.pdfIn PDF document text
    • https://cdn.sqhk.co/jonilinenuvo/DpKFMhe/lododuvamawoji.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/48300005953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388181/normal_6042c11abb49f.pdfIn PDF document text
    • https://cdn.sqhk.co/kozosorole/hAihcie/sudatativoberuxofej.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/MgeZgis/66308357963.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanunir/gkgjihf/zombie_roadkill_hack_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sitok/bulbulay_ary_digital_drama.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/riwubiru.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/audi_s4_avant_for_sale_used.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/brother_p-_touch_1000_label_printer_manual.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/set_up_tenvis_ip_camera.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/74463879401.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001920c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1920C 5332 bytes
SHA-256: 27410be68b604fb1588cbb9341816c4795269721ebc53ed3a51b53ce254fef7d
font_01_sfnt_off0001a422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A422 10888 bytes
SHA-256: 4969aaa91df3dde3d6247bf300ceee48247e046b67b83a5e2ea6df9f3930816d

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