Malicious PDF — malware analysis report

Static analysis result for SHA-256 f828cc03c772c1b2…

MALICIOUS

PDF

37.5 KB Created: 2020-04-13 06:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c1c43fb6e824d27b56d71c9cc63e8cb7 SHA-1: 7baf7bc730209f331b0faa4956fd9dc54e5c3ae1 SHA-256: f828cc03c772c1b2f270c16ad2eb3ebd1265ee71350f54b8e6138e3a87bf383c
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which are numerically or generically named and hosted on unrelated domains, indicating a link farm or SEO spamming technique. The document body, though partially corrupted, contains references to URLs that are likely used to redirect users to malicious content or phishing sites. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is part of a malicious distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://crosseyedcomedytour.com/uploads/1/3/0/6/130621158/130621158.html#potencia+ar+condicionado+split+24000+btu
    • http://bestratesglobal.com/uploads/1/3/0/7/130740462/zexibazowapafeno.pdf
    • http://sugartitties.com/uploads/1/3/0/3/130379133/fufog.pdf
    • http://mta-sts.mx.orchidvitality.org/uploads/1/3/0/5/130550698/b193a7177.pdf
    • http://thelastblankever.com/uploads/1/3/0/4/130475973/3973096.pdf
    • http://paulaluethensoper.com/uploads/1/3/0/5/130589427/2b74b06c953.pdf
    • http://greenwichgems.com/uploads/1/3/0/4/130489097/b4b70b.pdf
    • http://vacationsbyangela.com/uploads/1/3/0/4/130476657/letofubet.pdf
    • http://peacefilledhome.com/uploads/1/3/0/2/130288639/siredaf-jukirel-kigomozatebas-dinomatoduga.pdf
    • http://kingmunky.com/uploads/1/3/0/8/130814483/8944436.pdf
    • http://halidacatic.com/uploads/1/3/0/5/130588786/voviloniwugokij.pdf
    • http://soniahidalgoeventos.com/uploads/1/3/0/6/130604244/ninip.pdf
    • http://yzy1.net/uploads/1/3/0/4/130476262/1081492.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006656.bin
0c784edcd40419df1b744eaaa340feca615f75337ef744dc383ce87c35fa1c46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6656 10048 bytes

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