Malicious PDF — malware analysis report

Static analysis result for SHA-256 204d42e94c015d00…

MALICIOUS

PDF

75.7 KB Created: 2021-02-26 17:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 7984d7e38d46d2e49b024c004d439409 SHA-1: 3f49ca2105f3ae73c661a7ed3a2a963defd90f08 SHA-256: 204d42e94c015d0080567e4943a0d1ed3a63b620e148468aa127ea73fec4add7
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many pointing to disposable hosting or redirector infrastructure, suggesting a link farm designed to distribute malicious content or phish users. The document body, though heavily obfuscated, appears to be a lure related to photography tips, masking the true malicious purpose.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=tips+for+beginners+photography In PDF document text
    • https://fatajoser.weebly.com/uploads/1/3/4/6/134655124/figolobegoso.pdfIn PDF document text
    • https://pufedoxavode.weebly.com/uploads/1/3/4/6/134613169/7114308.pdfIn PDF document text
    • http://puloxev.iblogger.org/vadowun.pdfIn PDF document text
    • https://bibomezu.weebly.com/uploads/1/3/2/7/132710601/2392069.pdfIn PDF document text
    • https://dupujemewo.weebly.com/uploads/1/3/4/0/134040979/8ddc3bd486fc3d.pdfIn PDF document text
    • http://gimepar.22web.org/fluke_87v_datasheet.pdfIn PDF document text
    • https://cdn.sqhk.co/xolokenuw/hdjdFd9/vamuzapivozawegur.pdfIn PDF document text
    • https://marotebage.weebly.com/uploads/1/3/4/7/134712984/wasig.pdfIn PDF document text
    • https://piwaxokireruber.weebly.com/uploads/1/3/0/9/130969414/6e20f7c2.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/iSz7Rih/12782849788.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/hhhjaGs/mamib.pdfIn PDF document text
    • http://xuzekamusudis.iblogger.org/nerukewavojowezezekovenaj.pdfIn PDF document text
    • https://pimuvetu.weebly.com/uploads/1/3/4/6/134635596/5713752.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/fgjEbrz/73076802686.pdfIn PDF document text
    • https://ruwezowoja.weebly.com/uploads/1/3/0/7/130776808/powoxusopebobi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulikoviluxugu.rf.gd/91812308620.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/xigulajovototinefejages.pdfIn PDF document text
    • http://gatafowe.epizy.com/gorefiwewovepuzun.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/52312574010.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_off0000ec21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC21 5320 bytes
SHA-256: 2d35b41efca684ddf837475e2c6671449bcb0261d3789bae31786d8c75525948
font_01_sfnt_off0000fe3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3C 10276 bytes
SHA-256: 850634d4af626613d3d71bd28816c00f470ad8f2f58786904fa6f861c8e2e4c8

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