Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3875318b6284e0…

MALICIOUS

PDF

98.6 KB Created: 2021-06-09 23:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cb6b996fc383d4f0310e314eb84341e8 SHA-1: 45959260a1aae197b34d90c8f0e4d5d4c1feef13 SHA-256: 7f3875318b6284e0a242d72798b3163ce1a982bee7600acdf671e17dfd1ee082
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. The primary lure appears to be 'Town hall 10 base design', suggesting a phishing or social engineering tactic to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://pixomot.ru/pbw?utm_term=town+hall+10+base+design PDF link annotation
    • https://fepapiwepum.weebly.com/uploads/1/3/4/3/134382013/dd920.pdfIn PDF document text
    • https://wepesinojaru.weebly.com/uploads/1/3/2/3/132303052/3255926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420927/normal_601b2ebe75560.pdfIn PDF document text
    • https://pedudevapo.weebly.com/uploads/1/3/4/7/134719514/be73a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392451/normal_60372c811c8f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_604470a40af6b.pdfIn PDF document text
    • https://famosufed.weebly.com/uploads/1/3/4/9/134900490/25810089ccbc3d.pdfIn PDF document text
    • https://kewivuzakokefi.weebly.com/uploads/1/3/0/7/130775129/vifosu.pdfIn PDF document text
    • https://samituvejasuw.weebly.com/uploads/1/3/1/4/131406365/b7e17ae76a.pdfIn PDF document text
    • https://lotisawiro.weebly.com/uploads/1/3/4/6/134625457/gojaxamiw.pdfIn PDF document text
    • https://siwuxamafovad.weebly.com/uploads/1/3/4/4/134489720/36a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496151/normal_5fdc25e5f0115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447880/normal_60681af38318f.pdfIn PDF document text
    • https://sowozulame.weebly.com/uploads/1/3/4/7/134733070/9577a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/144626256/relative_clauses_with_prepositions_grammar.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/w/file/fetch/144672276/reset_wifi_adapter_android.pdfIn PDF document text
    • http://vogivakazela.pbworks.com/w/file/fetch/144812283/descargar_whatsapp_plus_uptodown_2020_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ebf6473-3eb1-44f8-bf3b-1a4693380094/how_to_find_original_photos_in_iphoto.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/w/file/fetch/144461994/zebizisojul.pdfIn PDF document text
    • http://karulimomaw.pbworks.com/f/videoder_apk_download_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c2ab66-0195-4825-a975-1d2975c738dc/nabamituvefedunanuvuka.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/w/file/fetch/144501480/rulazipururuwolalo.pdfIn PDF document text
    • http://wepoline.pbworks.com/w/file/fetch/144450399/53747622586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9a71f9-3273-48c4-8190-f0165263dc09/59129759179.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13173 5072 bytes
SHA-256: cdb7226e92dc3ca2057a9f1d35672bfee0530a4f765f7f1e83408150336dec96
font_01_sfnt_off000142b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142B0 15072 bytes
SHA-256: 9441314bd7540c5e1fb019532eeec56a80e2e933d772dbb8a44302c8c52c3c44
font_02_sfnt_off00016eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EB8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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