Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c59da6a56ce787…

MALICIOUS

PDF

83.0 KB Created: 2020-11-09 22:35:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adb87c8c600b91174b3c13ff18f53fe7 SHA-1: 5fc8742acf98a03adfd5088ea1cb5e3a276fc436 SHA-256: 17c59da6a56ce78700e7719475434809b88e1fc8507cfce31561ca79580fb198
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by multiple heuristics and an ML classifier, with ClamAV identifying it as a phishing trojan. It contains numerous external links, including a link farm pointing to other PDFs, and a primary URL that appears to be part of a phishing or malware distribution campaign. The PDF's structure and embedded links suggest it's intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://traffking.ru/aws?keyword=oracion+sangre+de+cristo+hijos
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f8a71790814a.pdf
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f9c3e52c3a41.pdf
    • https://fikupekuxugo.weebly.com/uploads/1/3/4/6/134612485/folubo.pdf
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/renezojajesume.pdf
    • https://cdn-cms.f-static.net/uploads/4393179/normal_5f97d1946be25.pdf
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/9339422.pdf
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/pategeralipufi.pdf
    • https://cdn-cms.f-static.net/uploads/4386073/normal_5f90fedc0a97c.pdf
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/5973265.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bulalowisu/rinaze.pdf
    • https://s3.amazonaws.com/jamokaroxoj/78812881056.pdf
    • https://s3.amazonaws.com/fofeguj/irrigation_engineering_lecture_notes.pdf
    • https://s3.amazonaws.com/nilafafakem/the_assassins_blade_free.pdf
    • https://s3.amazonaws.com/gelawiweza/sizarivixakezejavutexugu.pdf
    • https://s3.amazonaws.com/befevifa/critical_lens_essay_outline.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc35.bin
be74f3d3b377dbcd1a3daad101d29d74db936b0efda7c6ef1abbe5165114c3cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC35 5060 bytes
font_01_sfnt_off0000ed50.bin
8243a2978354b99ad9fc1765d3878328d49e2998d0a5549394a0bdfef85e0506		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 2188 bytes
font_02_sfnt_off0000f76f.bin
4aa36b3729c43432c3c730a425c5101b682dbbc9be6d68423e8f90de549c7622		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF76F 10852 bytes
font_03_sfnt_off00011aee.bin
34f393951a2d3db0d762c31d1ca698e177a53b7a5969336fa652e3f935eaa1ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEE 16268 bytes
font_04_sfnt_off00013053.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13053 4324 bytes

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