Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc30c5138134df1…

MALICIOUS

PDF

56.7 KB Created: 2020-11-03 12:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d4bc26968b6dcc2b4977c172d9b4ab8 SHA-1: 175dbb31de62fe95d9695edd636af239703f4e96 SHA-256: fdc30c5138134df17098c48099f200598882149915acb8eec457ce003928de58
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, identified as a PDF link farm, with the primary link directing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the URLs, suggesting an attempt to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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?keyword=heavy+rain+platinum+trophy+guide
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5f9ab0d4d8aa4.pdf
    • https://cdn-cms.f-static.net/uploads/4445879/normal_5f9edcb593db2.pdf
    • https://garigewofunem.weebly.com/uploads/1/3/4/3/134314314/sarikakidominizij.pdf
    • https://defejeve.weebly.com/uploads/1/3/4/3/134386135/lokepaja-bulizef-sasubebosado-jodukozefagivuj.pdf
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/8484594.pdf
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f9b46e894525.pdf
    • https://kavaxaxogemiren.weebly.com/uploads/1/3/4/4/134441995/jiseg.pdf
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/vukirusupi.pdf
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f89abdcb5c44.pdf
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/3cfd05c7.pdf
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87030955d1d.pdf
    • https://pokumajapemen.weebly.com/uploads/1/3/4/4/134490217/835683.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aedc8e6f-79ce-4f82-ba34-4cab4a3a7077/bakegapodulil.pdf
    • https://cdn.shopify.com/s/files/1/0499/9692/3075/files/56229474365.pdf
    • https://cdn.shopify.com/s/files/1/0432/7263/4536/files/53699096484.pdf
    • https://uploads.strikinglycdn.com/files/76e966db-6bad-4461-8ad8-a1fb105af1b7/74314819153.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_off0000ade8.bin
4c0c42277c84924faaf8a20aa1583fa43f528f84b9907a77b336a5f1077dd93c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xADE8 23332 bytes
font_00_sfnt_off00007772.bin
cb204ddab1c6b1b15e5d86a2c36fd7342af766ec88496994d3375cb67a4d34e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7772 5320 bytes
font_01_sfnt_off00008967.bin
cab3182d7c6ac6521a021b816dc065ebee8dbc02b9624c5a52fbabce98476e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8967 10616 bytes

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