Malicious PDF — malware analysis report

Static analysis result for SHA-256 7204950356e784b5…

MALICIOUS

PDF

66.6 KB Created: 2021-06-05 14:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 606fab2c0a4dd09a158696823a247a7d SHA-1: ad1406a58c59c73f1bc284bb84dc9e598a49787b SHA-256: 7204950356e784b529ff4875cf9bf69f7be9c69a95fc8ce9b84912260afb60ef
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm. The embedded URLs and the PDF structure point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=charlie+movie+hd+images PDF link annotation
    • https://dasuzixegofewaw.weebly.com/uploads/1/3/7/5/137501835/88f88d9bf35bb.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/042f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_605d6a14a3f92.pdfIn PDF document text
    • https://xixonulavef.weebly.com/uploads/1/3/2/6/132683080/2adab178.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469355/normal_5fcf01d090dd2.pdfIn PDF document text
    • https://bolumuratojepo.weebly.com/uploads/1/3/4/7/134749128/vavemufogu_panalat_siwani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_601e3ba188c33.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/8978213.pdfIn PDF document text
    • https://wozukepob.weebly.com/uploads/1/3/4/0/134017809/d2eb11199dfd.pdfIn PDF document text
    • https://motovatexasej.weebly.com/uploads/1/3/4/9/134900011/ledekaxitinip.pdfIn PDF document text
    • https://dixelopenam.weebly.com/uploads/1/3/4/5/134590152/xijoretamoko.pdfIn PDF document text
    • https://vogoworelo.weebly.com/uploads/1/3/4/2/134266182/3838400.pdfIn PDF document text
    • https://punafatig.weebly.com/uploads/1/3/1/4/131408139/fufadabupokan.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/7716789.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lesokulovisu.pbworks.com/f/fhrerschein_formel_bremsweg_reaktionsweg.pdfIn PDF document text
    • http://dawijunegolo.pbworks.com/w/file/fetch/144422589/wugudomexerafesedekenusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e28089-969c-4bd5-aac1-f79ac65d2287/how_to_write_a_letter_requesting_a_severance_package.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b433638-9e5e-481c-8e9e-6af2cabe7ca2/6162615537.pdfIn PDF document text
    • http://wotesova.pbworks.com/f/fuxojesasigetalif.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_off0000c9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D7 5204 bytes
SHA-256: 2c9c5d25ae9534e7f2ad29b9c042f64aa32866a5a276b973c75fd1b4a8e9ff81
font_01_sfnt_off0000db61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB61 10000 bytes
SHA-256: e401f050beb9b73a61a3bdebc0630f5ffaf6993077b42b6663080c24ca20931f

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