Malicious PDF — malware analysis report

Static analysis result for SHA-256 699352b9a00de45d…

MALICIOUS

PDF

83.0 KB Created: 2021-02-06 22:17:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ee9daeb01d1bf6f82cb532540cf1d762 SHA-1: 750e884454c7d16bcc6235f56582208c7724ead3 SHA-256: 699352b9a00de45d7097025acd897f83a82e4013616a0b699197e9a0f693cdd7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing. The primary URL, 'https://seumenha.ru/wb?keyword=kanken%20bag%20size%20guide', suggests a lure to a fake informational page. While no scripts were explicitly extracted, the PDF structure and the high number of external links, including a link farm heuristic, indicate malicious intent. The ML classifier and ClamAV detection further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://seumenha.ru/wb?keyword=kanken%20bag%20size%20guide PDF link annotation
    • https://rafutadavo.weebly.com/uploads/1/3/1/6/131637052/jitifawufalato_fopugo.pdfIn PDF document text
    • https://pudexaxetodeli.weebly.com/uploads/1/3/2/6/132683251/mezuxavokuliduxebu.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/sumitaxawemuga.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/kjdXLHI/xajonadogofaveda.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/mufolanetag.pdfIn PDF document text
    • https://parikijofema.weebly.com/uploads/1/3/1/3/131383717/wixiz.pdfIn PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/81fbd00a002e991.pdfIn PDF document text
    • https://nujazovarurep.weebly.com/uploads/1/3/1/8/131856890/2714313.pdfIn PDF document text
    • https://femuxejafedanib.weebly.com/uploads/1/3/2/7/132740958/vebom.pdfIn PDF document text
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/e5431249ba.pdfIn PDF document text
    • https://puzilefamurujuz.weebly.com/uploads/1/3/2/7/132712080/0708be82.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
    • https://s3.amazonaws.com/jidosatikim/vipasejozemi.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/church_history_in_plain_language_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/math_in_the_modern_world_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/github_markdown_emoji_cheat_sheet.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_off0000ec5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5A 4780 bytes
SHA-256: 5d8f622a27a2b93dc562c4a5eec4bb622b0563f0fa9df0435143858ff8d3fc98
font_01_sfnt_off0000fca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 16232 bytes
SHA-256: 183cd161cfd40cd415375d4f78bcdf2030b693a01868c0df4838170b85bfba14
font_02_sfnt_off00012f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F25 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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