Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc5b46addd62af83…

MALICIOUS

PDF

33.3 KB Authoring application: Mobipocket Creator
MD5: 267c66c3a4e4c41c0f0597e6e3c1cc91 SHA-1: c68caf3a1245f1ee2b7d6113f699d7ffd3bafa34 SHA-256: dc5b46addd62af838bd4cbaddbf8905ac369a60b55ecfc69118f64157cc80fc7
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to other PDF files hosted on various domains. This technique, identified by the PDF_SEO_LINK_FARM heuristic, is commonly used to distribute malware or conduct phishing attacks by overwhelming search engines and tricking users into downloading malicious content. The ML classifier and ClamAV detection further support the malicious nature of this file.

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://kellysandau.com/uploads/1/3/0/3/130379435/ziwamojato.pdf
    • http://northbayjudoclub.com/uploads/1/3/0/5/130546759/sewetutuwidesumalone.pdf
    • http://richardramos.net/uploads/1/3/0/6/130620998/2cc98f5f409a0f.pdf
    • http://ninjaproxies.org/uploads/1/3/0/4/130476541/kalakemetedor_zazog_jemevezifa_dogike.pdf
    • http://georginaward.com/uploads/1/3/0/6/130604907/pofunakaxemu-pokefo-vufozipewojaji.pdf
    • http://atxj.com/uploads/1/3/0/7/130739383/mavakiwogufediso.pdf
    • http://anniesditta.com/uploads/1/3/0/4/130483690/davomir.pdf
    • http://myptresource.com/uploads/1/3/0/6/130620314/nudanemuk-vozifirubares.pdf
    • http://nigelcrossan.com/uploads/1/3/0/3/130379482/kaxevat.pdf
    • http://deadbikerssociety.net/uploads/1/3/0/7/130738803/sudorawegelofafuxe.pdf
    • http://crowdergize.com/uploads/1/3/0/5/130590361/9937362.pdf
    • http://ncfash.com/uploads/1/3/0/5/130550834/ac56fe88c0222b1.pdf
    • http://leplaisirdevendre.com/uploads/1/3/0/7/130740008/negepob-nuzol-gizudo-vuxizuxozun.pdf
    • http://miznora.com/uploads/1/3/0/5/130589219/399b7f24.pdf
    • http://rickyzheng.net/uploads/1/3/0/5/130589238/5936217.pdf
    • http://myleokingspage.com/uploads/1/3/0/2/130270761/eed2eb102.pdf
    • http://iteamedu.in/uploads/1/3/0/4/130488700/9290aa0c4d9b427.pdf
    • http://cuskga.com/uploads/1/3/0/4/130483940/sinitijobaj.pdf
    • http://reneuhair.net/uploads/1/3/0/4/130476908/wigaludidudukede.pdf
    • http://atlantapermaculture.com/uploads/1/3/0/6/130620268/bibebusupo_pemomovemep_kijilekem.pdf
    • http://nieuwbuurttechniek.nl/uploads/1/3/0/8/130814225/4487d916ac76b6.pdf
    • http://newperspectivemedical.com/uploads/1/3/0/2/130272600/130272600.html#oxford+english+grammar+course+chomikuj
    • http://reneuhair.net/uploads/1/3/0

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000233b.bin
292aed31723905f3b693e47be698b7514b0eed9e023487842a6a0714a505d913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x233B 7148 bytes

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