Malicious PDF — malware analysis report

Static analysis result for SHA-256 0342ed12954492cc…

MALICIOUS

PDF

76.4 KB Created: 2021-02-19 21:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5b09e56f855c59c691b377b7e4c89e86 SHA-1: 507e96de362f1dbfa405ba88caef927ad77df186 SHA-256: 0342ed12954492ccda54bcdbe8d227e9460a172af39ca68d6ec69d3c05732674
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ML classifier and ClamAV. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URL 'https://jottigo.ru/strik?utm_term=how+to+play+jump+force+with+keyboard' and the first link in the link farm 'https://dazuzoboda.weebly.com/uploads/1/3/4/0/134017564/litumeze_fejutobiw_fegarefid_fukigi.pdf' are identified as potential IOCs. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely related to phishing or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/strik?utm_term=how+to+play+jump+force+with+keyboard PDF link annotation
    • https://dazuzoboda.weebly.com/uploads/1/3/4/0/134017564/litumeze_fejutobiw_fegarefid_fukigi.pdfIn PDF document text
    • https://kurisakon.weebly.com/uploads/1/3/4/5/134504438/rubexozobisenirer.pdfIn PDF document text
    • https://guxuxexor.weebly.com/uploads/1/3/0/7/130775085/6353167.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/649cea9c98e.pdfIn PDF document text
    • https://bekodezu.weebly.com/uploads/1/3/1/8/131856725/wozubumibisiteb_muludid_xomep.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/6XjdvV7/87346653134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386349/normal_5fc916f372ca5.pdfIn PDF document text
    • https://suwekamepegatir.weebly.com/uploads/1/3/2/6/132682685/2296505.pdfIn PDF document text
    • https://rugepokowefi.weebly.com/uploads/1/3/5/2/135294276/2a9e582202.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421957/normal_5ffe987af0193.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/hPjfLgi/storyline_online_youtube_turkey_trouble.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/zowibatev/xetaxivajisebidi.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/5680659362.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/53460572849.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/google_sheets_merge_cells_greyed_out.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/41272229479.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_off0000ec37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC37 5652 bytes
SHA-256: cc0d3ad10a17326ba6f38c848aaf00c718f02fad5c8e6f731a758417d8735dc5
font_01_sfnt_off0000ff57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF57 10708 bytes
SHA-256: ec4218717e703c590e52979b1a52e725df52a82036e6b65fc944c23402e6c226

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