Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fad2c01e8baa163…

MALICIOUS

PDF

43.8 KB Authoring application: Smallpdf Desktop
MD5: b21f2cbdf3b5687795ea108f02c1a68c SHA-1: 022b1a96bdd9a9e19c4452c3263194fd49d079ab SHA-256: 2fad2c01e8baa16348eed4e87735ed1eced9459acd5e262e8df7e21efaa5e8c0
150 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The PDF contains a large number of embedded external links to other PDF files, a technique often used for SEO spam or to distribute further malicious content. The document body contains seemingly random text related to football scores, likely as a lure.

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://aprilcable.org/uploads/1/3/0/3/130313500/zajevada_kifulatadem_lojadakin.pdf
    • http://cmpnow.com/uploads/1/3/0/6/130604044/9447248.pdf
    • http://createcashflowformula.ca/uploads/1/3/0/6/130604165/wegefitetefixepuj.pdf
    • http://phorion.com/uploads/1/3/0/3/130313414/120472.pdf
    • http://pandalanguage.org/uploads/1/3/0/7/130775386/4355695.pdf
    • http://mindfulnessforteensaustin.com/uploads/1/3/0/6/130604129/pozafogavunif.pdf
    • http://myidahoinsure.com/uploads/1/3/0/6/130639222/sagegafu.pdf
    • http://nellie-vanbruggen-edu.ca/uploads/1/3/0/5/130539825/wosikisetisobamew.pdf
    • http://nangrayphotography.com/uploads/1/3/0/8/130814173/popobujuzivifa-viwiwuge.pdf
    • http://elizabethgracepaperandpen.com/uploads/1/3/0/6/130639076/romusorajube.pdf
    • http://tcsonline.net/uploads/1/3/0/5/130539871/130539871.html#football+world+cup+2018+live+score+today

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012b0.bin
5f23e7c18e0f5e8c498e0c61e3c34cf99142b6dee9f485438b7ec0635302f234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0 9180 bytes
font_01_sfnt_off000060a1.bin
d2ee899a7d11ad44a1c554c7dcbf98ed5f34f0590b208b0b62bb3f0892a592f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A1 9800 bytes

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