Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e6e1028cf65067…

MALICIOUS

PDF

78.5 KB Created: 2021-06-07 08:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 135ecff1cdf91ae8849049446cd238ca SHA-1: b5f7f8457f2950e85c5556182af2b2345ce63fbf SHA-256: 13e6e1028cf65067c372b80142c754b6a1b7f2ebb540ab1c9695c838a7f6d79c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://synerhu.ru/pbw?utm_term=qayamat+movie+mp3+song+download+webmusic', suggests a lure related to media downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://synerhu.ru/pbw?utm_term=qayamat+movie+mp3+song+download+webmusic
    • https://cdn-cms.f-static.net/uploads/4409411/normal_606a745eaf840.pdf
    • https://cdn-cms.f-static.net/uploads/4413236/normal_601e81b2547e1.pdf
    • https://cdn-cms.f-static.net/uploads/4382617/normal_60691edce7c0c.pdf
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5fc854791adcc.pdf
    • https://cdn-cms.f-static.net/uploads/4448337/normal_6068cfffb8675.pdf
    • https://cdn-cms.f-static.net/uploads/4462036/normal_6046607007017.pdf
    • https://gerudupox.weebly.com/uploads/1/3/2/7/132712596/veduxa.pdf
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5fd3194c91eb4.pdf
    • https://static.s123-cdn-static.com/uploads/4462974/normal_5feb9cc928c78.pdf
    • https://static.s123-cdn-static.com/uploads/4478127/normal_600254e7ad1e1.pdf
    • https://static.s123-cdn-static.com/uploads/4471948/normal_60048f5e5fda6.pdf
    • https://rusipowesurajuk.weebly.com/uploads/1/3/4/5/134520473/rutobunum.pdf
    • https://razezoxuwen.weebly.com/uploads/1/3/1/4/131453099/04bc8.pdf
    • https://wulaludotesi.weebly.com/uploads/1/3/0/9/130969185/bubowelerobip.pdf
    • https://fafovufurivu.weebly.com/uploads/1/3/2/6/132695925/b1e2353e5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pefagisunel.pbworks.com/w/file/fetch/144755736/percy_jackson_and_the_stolen_chariot_part_2.pdf
    • https://uploads.strikinglycdn.com/files/44cb3aa7-b34e-420c-858d-6b9908f20a0d/dufofenojise.pdf
    • https://uploads.strikinglycdn.com/files/521814e0-90ae-487b-97ed-511a9a2b344a/coleman_dual_fuel_lantern_replacement_glass.pdf
    • https://uploads.strikinglycdn.com/files/764488e9-dcd7-4319-8389-50f8341fa696/85089851395.pdf
    • https://uploads.strikinglycdn.com/files/c90d6e92-1c73-45ad-a6d2-26c2f49ffbe5/nesifufiwokotazefo.pdf
    • http://veputuvus.pbworks.com/f/ralukuvur.pdf
    • http://komogabovuwa.pbworks.com/f/19525226778.pdf
    • http://kukepofarit.pbworks.com/w/file/fetch/144446883/57423072521.pdf
    • https://uploads.strikinglycdn.com/files/2764fb69-b583-4c4e-9d88-fba9c7107b1c/dareputowarofivatupedubu.pdf
    • http://silasofinat.pbworks.com/w/file/fetch/144476778/69744546900.pdf
    • http://bezawagiga.pbworks.com/w/file/fetch/144538113/6.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d9.bin
644b1cfdf5cb293cd0d229d09ec7e54cf939204e3f5a53bedfc56f938e21eaf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 5916 bytes
font_01_sfnt_off00010707.bin
9c3cb9449fe5146109f231474172a1a501f9a52f9a5f7737117d281cde2c1b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10707 10864 bytes

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