Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8a8fc5afc30e1e…

MALICIOUS

PDF

46.9 KB Created: 2020-07-28 21:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f989fb83e4f6cdc8c5b31cac9412e7d4 SHA-1: 0fcb778d50e06f9022327491b0ac3b979fa17e7e SHA-256: 8e8a8fc5afc30e1e2be906fa057e9efdde1a3401f312ea6ac5f8f695bb0e2ea3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a 'Bewator codelock manual'. The presence of a link farm and the ML classifier's high confidence score further support the malicious nature of this document, indicating it's likely part of a phishing or malware distribution campaign.

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://ttraff.com/pify?keyword=bewator+codelock+k42+manual
    • http://files.delrayvillasplat2.com/uploads/1/3/0/8/130814104/89a88726741cb2a.pdf
    • http://files.arsenalmarketingstrategies.com/uploads/1/3/1/6/131637108/b47a0ea.pdf
    • http://files.shopdonanolicigar.com/uploads/1/3/1/8/131871569/belalopofi-zunoz-mavalogopalotej.pdf
    • http://files.siwanhill.com/uploads/1/3/1/4/131483955/xiraludopipimutewi.pdf
    • http://files.biodiversitynz.org/uploads/1/3/1/3/131397964/doribimi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/34658569859.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejotoxirebogoro.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/83676093271.pdf
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/bonef.pdf
    • https://cdn.shopify.com/s/files/1/0435/4785/2959/files/21499062299.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90296180399.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/53469376192.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/65031556372.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/teseliz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6938/files/besazevevegiwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/42956152550.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/pagote.pdf
    • https://cdn.shopify.com/s/files/1/0436/2128/6050/files/gegarezudinewagirelaku.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6773/files/68547492410.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078b3.bin
34dae434aadad4dcad638190b822ab515d00505192fd1860776e980aa7e2b683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B3 5168 bytes
font_01_sfnt_off00008a40.bin
a8f98f93edac5430148ae5345856b3c0aec2d93686c28bbdd1a6cdeb24ce8c36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A40 10584 bytes

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