Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f522321d7d7c29…

MALICIOUS

PDF

76.6 KB Created: 2021-02-18 08:00:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bd085c81b5037bd70d87e6cb6b213de4 SHA-1: 3ccfd18183b4a2b9687bfe08268cb0e4fb97b33b SHA-256: a7f522321d7d7c29a0312c356d6124946a896869e2c5eeb00df911778ef912ad
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of external URIs and the overall structure strongly indicate an attempt to redirect the user to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=how+do+i+connect+my+ihip+bluetooth+speaker PDF link annotation
    • https://cdn.sqhk.co/zimuteraf/hgcjdYe/love_art_sushi_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/0ig6Oih/top_5_nintendo_switch_accessories.pdfIn PDF document text
    • https://lipijunozawisek.weebly.com/uploads/1/3/4/7/134721324/vefobubobunujolekasa.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/atv8id3/chain_reaction_game_show_app.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/Uhhjhjd/air_control_2_premium_apk.pdfIn PDF document text
    • https://ludolukek.weebly.com/uploads/1/3/4/6/134699908/8127599.pdfIn PDF document text
    • http://infonewstravel.com/xabasiruvujifupugiofi45.pdfIn PDF document text
    • https://digagewopaloz.weebly.com/uploads/1/3/4/6/134634746/e4f762b6.pdfIn PDF document text
    • https://cdn.sqhk.co/munenetifu/QWggGLb/8_ball_smash_game_download.pdfIn PDF document text
    • http://missunik.space/eric_asimov_new_york_timesjbjm8.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/jgjiikW/57024798146.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/6e5dhgl/monster_arena_ffxv.pdfIn PDF document text
    • https://zatiwakap.weebly.com/uploads/1/3/1/8/131871625/zixelezozirozip.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/memowisibeduneb_nexupuwodazonog_mobopekivojide.pdfIn PDF document text
    • https://fotawadibegul.weebly.com/uploads/1/3/1/1/131163643/31e2068.pdfIn PDF document text
    • https://saduzuwaz.weebly.com/uploads/1/3/4/5/134599146/risovisasor-wawezajimij-wopixuwepatutun.pdfIn PDF document text
    • http://zowefokixot.iblogger.org/92320766999.pdfIn PDF document text
    • http://hayatevesigar.online/91697621739xkzd0.pdfIn PDF document text
    • https://poxixarusel.weebly.com/uploads/1/3/4/1/134131789/rufotazufofusid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zovixis.epizy.com/como_descargar_antivirus_gratis_para_android.pdfIn PDF document text
    • http://zawidapiwixub.epizy.com/varosusuzamifajibobig.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_off0000ecf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF0 5672 bytes
SHA-256: 0f1b1f83c92b7b665e3283a3d03d8b7ff9b7570d46998f6f907c3ccac02d1978
font_01_sfnt_off00010021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10021 10860 bytes
SHA-256: 2f4ae47ce5fe25284b7c674894c6fb6b54be6a4d844cc5117c73c9c1e7d9e63d

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