Malicious PDF — malware analysis report

Static analysis result for SHA-256 7859da6fd5fc8250…

MALICIOUS

PDF

42.4 KB Authoring application: Poppler-utils
MD5: 0d47d2f402658b8dea39d6eddade31d2 SHA-1: cb6d54cc2aeea885c3bc02a4bca686e0208ec3d5 SHA-256: 7859da6fd5fc82505948c508e34381cc15ff67211d49cfd7e5ce003c02e4bcb0
150 Risk Score

Malware Insights

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

The PDF_SEO_LINK_FARM heuristic indicates a mass external link farm, with 31 links pointing to other PDF files. The ML classifier and ClamAV detection strongly support a malicious classification. The embedded URLs are likely part of a phishing or malware distribution scheme, aiming to redirect users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://www.bdecwa.com/uploads/1/3/0/6/130604250/d8ab4d777462b1.pdf
    • http://rrrtag.com/uploads/1/3/0/2/130287536/642489.pdf
    • http://stevenzhang.com.au/uploads/1/3/0/4/130483983/wegomerudexat.pdf
    • http://mailbear.org/uploads/1/3/0/6/130639861/501f9ac7a251e.pdf
    • http://mta-sts.mail.sonsessencials.cat/uploads/1/3/0/8/130813649/wolalutogobedos-zewiziz-kugilepi.pdf
    • http://songhurstexperiment.com/uploads/1/3/0/5/130590653/rebotufoketulezu.pdf
    • http://www.fraskabirraviva.com/uploads/1/3/0/7/130740084/lureguw_xapizosekiba_dujazu.pdf
    • http://pct4career.com/uploads/1/3/0/4/130488181/duwirenovajol-nabaloniwi.pdf
    • http://my-english-lesson.us/uploads/1/3/0/4/130489371/rumapeguwu.pdf
    • http://weightlosssurgerycoaching.com/uploads/1/3/0/6/130640116/madegoxoz.pdf
    • http://www.unihornlabs.com/uploads/1/3/0/2/130289213/53a6f84.pdf
    • http://drjeffbarone.com/uploads/1/3/0/6/130639418/fafemojatoj.pdf
    • http://www.fortitudecapitalmgt.com/uploads/1/3/0/2/130270866/retarix_dexajilunig_vufisew.pdf
    • http://cookielovecustomsugarcookies.com/uploads/1/3/0/6/130604748/vonepo.pdf
    • http://rob-write.com/uploads/1/3/0/5/130588651/7332902.pdf
    • http://leegiles.net/uploads/1/3/0/7/130776763/c07908eabda.pdf
    • http://www.kaurbeautybar.com/uploads/1/3/0/4/130489527/podudun-fexejez.pdf
    • http://metamixis.com/uploads/1/3/0/2/130291475/5669661.pdf
    • http://autodiscover.jhigh18.com/uploads/1/3/0/4/130489833/130489833.html#30+ejemplos+de+adjetivos+posesivos+en+ingles+y+espa%C3%B1ol

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d6e.bin
bfca7b4c0806f6bbabb9d25c47b6074c5ecef667a12080010ff8495391c6a74f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6E 16320 bytes
font_01_sfnt_off00004630.bin
8b8e8fb237ef8ce2f3f637a0d38c10fb8416633e78c2aa6c3d32124918b99995		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4630 9100 bytes

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