Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f95059bf8218d8…

MALICIOUS

PDF

78.5 KB Created: 2021-02-26 09:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 01d9366970bb750673ed89ad6b292226 SHA-1: d8fad72d1937f67fd3cac2b0a2e065bf8238fdc5 SHA-256: 76f95059bf8218d8782ae41fc0853499d706c526d06920bce48ad827220f0d6f
186 Risk Score

Malware Insights

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

This PDF was identified as malicious by both ML classification and ClamAV, flagging it as a phishing trojan. The document contains a large number of external links, many pointing to disposable domains, consistent with a link farm or SEO abuse tactic. The presence of numerous external PDF links suggests an attempt to distribute further content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=what+does+bojangles+have+for+breakfast PDF link annotation
    • http://sawemawe.mywebcommunity.org/47163531419.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/12065816808.pdfIn PDF document text
    • https://cdn.sqhk.co/sokodajep/fidQThb/70248763985.pdfIn PDF document text
    • http://tajumizigareni.iblogger.org/40106110026.pdfIn PDF document text
    • https://wozukepob.weebly.com/uploads/1/3/4/0/134017809/divevowonevavum_bodabuninobibo_zawapetiruji.pdfIn PDF document text
    • https://zezowamizafomex.weebly.com/uploads/1/3/1/3/131381240/3a495.pdfIn PDF document text
    • https://zutomivopisi.weebly.com/uploads/1/3/6/0/136051870/noxabafasix.pdfIn PDF document text
    • http://lumacy.site/nogobafifarenphuwv.pdfIn PDF document text
    • https://kebomekol.weebly.com/uploads/1/3/5/3/135349545/4f64b766.pdfIn PDF document text
    • http://power-guard.shop/high_volume_ringtones_free_download26tgl.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/gfhaPgh/jokudel.pdfIn PDF document text
    • https://volifaredibeg.weebly.com/uploads/1/3/1/4/131437601/nafatu.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/open_sentry_safe_lost_combination.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofaxafogi.myartsonline.com/which_is_better_janome_or_husqvarna.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/senujaredokuwinijimisoke.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_off0000f3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E6 5524 bytes
SHA-256: 1da0cb9bf0fca406da80659f2c2a06bda23f3c8511b04a66b22940395a132a1d
font_01_sfnt_off000106c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C4 11300 bytes
SHA-256: af2377ad1fcd1bd99fcb631dc48e2a084600c87a83786059142ae7708789a0bc

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