Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d81e4286fb4027f…

MALICIOUS

PDF

79.0 KB Created: 2020-12-24 20:52:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9d41e947ef413bc6947ce0b0ab8d35a SHA-1: 1fa53a05a80b80e0fbd82e708ded01c3303a20d3 SHA-256: 0d81e4286fb4027f1cf0478c2f07af3affe05c9c46fb0d15f590dfc8f6a22b08
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this is a link farm designed to direct users to potentially harmful sites. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lead users to phishing or malware distribution pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=word+games+for+seniors+citizens
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5fbf652735cc2.pdf
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5fa338ad9e6b4.pdf
    • https://cdn-cms.f-static.net/uploads/4412761/normal_5fad20bab8ca5.pdf
    • https://cdn-cms.f-static.net/uploads/4415327/normal_5fac34446eef3.pdf
    • https://cdn.sqhk.co/bagudivibi/Mgicfjj/86370429613.pdf
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f8a5409cb78e.pdf
    • https://cdn.sqhk.co/retirijozi/bhi7gZQ/disc_challenge_fortnite.pdf
    • https://static.s123-cdn-static.com/uploads/4443594/normal_5fcae4f5cb5e6.pdf
    • https://static.s123-cdn-static.com/uploads/4393751/normal_5fccd11cb3279.pdf
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/626d10e049.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/68393863-f606-4862-8af1-58a2fa62d890/3dvista.pdf
    • https://uploads.strikinglycdn.com/files/12669657-96e3-42f9-b1e9-6b06c490f99b/mufobiguzivelase.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000113b6.bin
06f1e63de86fbd7ea08826e793ddd09a5d8005301dc4a69149cc2c6a96a8ce2c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x113B6 17624 bytes
font_00_sfnt_off0000dd67.bin
e3596788822d096fafe916ae772bf0e48cdc5b0ee0c2ce5eaa458862670ea0c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD67 5372 bytes
font_01_sfnt_off0000efb2.bin
0437a94dfb135341b8aed7bc8baec2ea30f4131969318b1d268cd51e0a5633cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 10444 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.