Malicious PDF — malware analysis report

Static analysis result for SHA-256 da48c3bc25a4e4c1…

MALICIOUS

PDF

58.6 KB Created: 2021-01-14 12:38:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b070cb359f38e9cf7a4c89f7dc649224 SHA-1: 0be3c736bbd60657cc741fe4a4da478d2f84da72 SHA-256: da48c3bc25a4e4c147ec68b8c035f3c3b138dfba69316d2dd7afd7595710a0d5
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://traffine.ru/aws?utm_term=cccam+2.+1.+3+ipk', is a primary indicator of this activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8253

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 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
  • 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://traffine.ru/aws?utm_term=cccam+2.+1.+3+ipk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447464/normal_5fee66fe3b559.pdfIn PDF document text
    • https://rubitolagaju.weebly.com/uploads/1/3/5/3/135330326/kiwodif-sipanadavoxasux-notajoxijofun-wafezoduwo.pdfIn PDF document text
    • https://liwusapewiso.weebly.com/uploads/1/3/4/7/134723342/jerezapi.pdfIn PDF document text
    • https://zejibafubetu.weebly.com/uploads/1/3/4/1/134108860/4aa2dca45.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/suxixejujo.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/jggZhhj/lepivoferomubosaf.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/Tiir3ie/zofijiziz.pdfIn PDF document text
    • https://bejitukinerebi.weebly.com/uploads/1/3/4/8/134890105/60ded8.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/Lhbzgfb/igi_commando_adventure_fps_action_shooting_game.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/jf2ifvY/download_invasion_modern_empire_apk.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/lopaxarusiw.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/4290719.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/aging_report_in_quickbooks.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/72177910784.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/platform_shoes_online_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/jotarokevanajunetu.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C5 5124 bytes
SHA-256: 82164476719f34e1ddfbad975e8df5dc537d7d99579e8f62fca15f8f82dec957

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