Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb6102d1a468ad9…

MALICIOUS

PDF

63.4 KB Created: 2021-02-24 02:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: da1d115bf92efc7c09fa9d74ee9e8262 SHA-1: 5e7177012af70c78085830acac087dc4792ab543 SHA-256: afb6102d1a468ad9b7c38f45dcdce7bf7efb5828c5458f9bd21aca2269d55d7c
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 0.9998

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://crophysi.ru/aws?utm_term=super+bass+portable+speaker+instructions PDF link annotation
    • http://idealslim-italiaofficial.site/1997_yamaha_timberwolf_250_4x4_specsbq3q7.pdfIn PDF document text
    • http://guitar.su/jubomixigmwxf.pdfIn PDF document text
    • https://lifovidas.weebly.com/uploads/1/3/1/8/131856672/wesokodoxubuwelesef.pdfIn PDF document text
    • https://pevarigemi.weebly.com/uploads/1/3/5/3/135303959/gizasaxexivavepis.pdfIn PDF document text
    • http://kalavar.xyz/60296462616h1inz.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/nenavowuketovi.pdfIn PDF document text
    • http://golesaluwo.66ghz.com/49911601901.pdfIn PDF document text
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/sedakeveluvi.pdfIn PDF document text
    • http://jatamonip.iblogger.org/xiteworutuguwukudogig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wutodabegaf.epizy.com/already_tomorrow_in_hong_kong_subtitle.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/railroad_retirement_board_form_aa-_1.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/beneath_us_movie_parents_guide.pdfIn PDF document text
    • http://ketonabewuzove.epizy.com/53879673044.pdfIn PDF document text
    • http://dajovomofoziso.rf.gd/ice_cream_to_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/bugsplat._dll_lol.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_off0000bc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC15 5236 bytes
SHA-256: 925691017540ba1ed34db1e2ac7f6e721b63989de7ff2f290fbb2c3148fa2002
font_01_sfnt_off0000cde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE8 10088 bytes
SHA-256: 40b23f08c85f67466deb355138ba4caec3eb8bb4eedcc3cad15db7aa78a37082

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