Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d8b8675f5680ca…

MALICIOUS

PDF

75.9 KB Created: 2021-03-27 22:20:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cf36fbcf61c3ab7471e8869e438671a5 SHA-1: c399760f1cd39ffc82a8b0dbe9133b60e1cabc81 SHA-256: 72d8b8675f5680cab9c168a13475647d7a8742bacc89213d117e92ae5e949338
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://zajinet.ru/123?utm_term=android+device+manager+apk+mirror PDF link annotation
    • http://genusttwsr.fun/tunegilelodemonigom24ggd.pdfIn PDF document text
    • http://13millions-warzone.store/quantum_mechanics_books_for_msckwwic.pdfIn PDF document text
    • http://juvimuduzi.22web.org/asus_rt-ac66u_repeater_mode_not_working.pdfIn PDF document text
    • http://beautysss.site/wubonerozopaferl8qgc.pdfIn PDF document text
    • http://nasodojazawito.iblogger.org/zifawolojusabalonipenivam.pdfIn PDF document text
    • http://goxelaxonudex.22web.org/99893511575.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezunas.epizy.com/hd_wallpapers_1920x1080_for_mobile.pdfIn PDF document text
    • https://539b613c-a54f-4c74-97b0-41cdc0f13365.filesusr.com/ugd/f6e6b4_a606bb0d879f47c4978eb7f4928aad42.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/play_bingo_online_free_without_ing.pdfIn PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_a1fff30d4d304fa08f6cc5c870a4eb64.pdf?index=trueIn PDF document text
    • http://zimemotom.rf.gd/fusadebuf.pdfIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_3bd001b162754e0eba07d978820b45aa.pdf?index=trueIn PDF document text
    • http://lakobomupixa.epizy.com/28893389798.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/is_codependency_good.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/65994767347.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/69664627671.pdfIn PDF document text
    • http://gibapomidumitar.rf.gd/94402938508.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/bcmon_apk_monitor_mode.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_eb3f34e78d7345b48b082ee33560824e.pdf?index=trueIn PDF document text
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_7181ab6a527d4ddeb0e1a5bb5a196f90.pdf?index=trueIn 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_off0000ed2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2F 5296 bytes
SHA-256: 55e4355a636e6d8bd90ca787bb98f99b8f466168ecbd6da0ef45e97f44c54804
font_01_sfnt_off0000ff26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF26 10300 bytes
SHA-256: dd1cdf3093c0dcd78c395c49ac91b0dcf01056c66e86951952a8dc159eae0d2f

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