Malicious PDF — malware analysis report

Static analysis result for SHA-256 9870026f419f36da…

MALICIOUS

PDF

28.2 KB Created: 2020-05-20 00:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06ebf2a1df74139d0a3e1da791aae2c2 SHA-1: ff8b82aa79e3bdbe38941cd3e36ca802ffe614c9 SHA-256: 9870026f419f36daeba358f9c45594ccfa4f8dbfba28e3793940d5d8e24ad56c
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The document body contains text related to 'Rasyonel sayılar zor sorular' (Rational numbers difficult questions), which appears to be a lure to disguise the malicious intent of linking to numerous external PDF files. The primary attack pattern involves directing users to a network of linked documents, likely for SEO spam or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://goodsmotorgarage.com/uploads/1/3/0/7/130740561/130740561.html#rasyonel+say%25C4%25B1lar+zor+sorular
    • http://theoasismethod.com/uploads/1/3/1/0/131070010/budafazoroxixi_wiwamagusivawev.pdf
    • http://ejmaintenanceservice.com/uploads/1/3/1/6/131606343/7427506.pdf
    • http://fountainoflifesupportservices.org/uploads/1/3/1/3/131380470/zawon_xuledemododi.pdf
    • http://c5pro-solutions.com/uploads/1/3/0/3/130379146/5053106.pdf
    • http://stefanstrakafinefurniture.com/uploads/1/3/0/5/130550844/747b603621d5.pdf
    • http://magnumopusglobal.com/uploads/1/3/1/4/131438175/favumiwozapilif.pdf
    • http://keenlivein.com/uploads/1/3/1/3/131384227/jomusozeje-wasurodotavo-negudexikubimi.pdf
    • http://neurorehabkent.com/uploads/1/3/1/4/131452842/gokenujewe_fulusatibuvawek_bigaxelewim_jamegawetatemid.pdf
    • http://glowwithnicole.com/uploads/1/3/0/2/130272086/jaxoxofaxewinat-nexuzipun.pdf
    • http://thelifecompanyllc.com/uploads/1/3/0/7/130776340/gifisibukan_nabale_kegebanetib.pdf
    • http://cleanzed.net/uploads/1/3/0/7/130775432/fajubetimofew-vutig.pdf
    • http://cloudmamamagic.com/uploads/1/3/0/2/130272985/205838.pdf
    • http://blackandpetrichor.com/uploads/1/3/0/6/130604527/30076c4333baad7.pdf
    • http://daniburton.com/uploads/1/3/0/6/130639143/166907.pdf
    • http://wearebones.com/uploads/1/3/0/4/130483572/jotelazodidifolunaga.pdf
    • http://rumble-records.com/uploads/1/3/1/3/131379026/6096508.pdf
    • http://iconizao.org/uploads/1/3/1/4/131406077/f9eee1d.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005020.bin
71971f5b60736fd0200abe9906632e1bccc14ee1353616284447b73433806e1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5020 10776 bytes

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