Malicious PDF — malware analysis report

Static analysis result for SHA-256 9256faff58f3c784…

MALICIOUS

PDF

49.1 KB Authoring application: Mobipocket Creator
MD5: 2a11cea60120109800dc9bfb9f8f7cc6 SHA-1: 7fd0572ab3481d559b79c6307fa76bf64a767435 SHA-256: 9256faff58f3c7842ae3d5ae92c61e3db9fb20f4fc9cab34b2768fcf14729f69
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, aligning with the PDF_SEO_LINK_FARM heuristic. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kofc869.org/uploads/1/3/0/6/130604588/zobedoto.pdf
    • http://motusbehaviors.com/uploads/1/3/0/6/130621082/b7227.pdf
    • http://mx.branaart.com/uploads/1/3/0/4/130476632/vidan.pdf
    • http://heritagechristeninggowns.co.uk/uploads/1/3/0/5/130551475/fa437.pdf
    • http://introvertssquaredshop.com/uploads/1/3/0/6/130640126/pomitutugotunupamor.pdf
    • http://nezhnoe-teplo.site/uploads/1/3/0/6/130621195/zurijolovepi.pdf
    • http://indiadiamondlabs.com/uploads/1/3/0/6/130603702/e3dde8c.pdf
    • http://www.manumission.org/uploads/1/3/0/8/130874435/3103a5a9c5cd.pdf
    • http://allsegservicos.com/uploads/1/3/0/5/130588733/namowe_kukoxafo.pdf
    • http://aoc-pco.com/uploads/1/3/0/2/130272631/6704889.pdf
    • http://www.chardonnais.com/uploads/1/3/0/5/130588567/wironagebef_xovikidefut.pdf
    • http://www.seafox-commander.com/uploads/1/3/0/4/130491075/1744595.pdf
    • http://www.combatrescueexperience.com/uploads/1/3/0/7/130739662/fedemukag-sizazirinu-tuvutujeluxubo.pdf
    • http://administrativevoices.org/uploads/1/3/0/6/130605012/9869103.pdf
    • http://naema.ca/uploads/1/3/0/6/130620290/7032358.pdf
    • http://www.serenrose.co.uk/uploads/1/3/0/5/130551543/8113104.pdf
    • http://getleanin21.com/uploads/1/3/0/6/130620936/06dfe3afc9bb.pdf
    • http://livepasta.com/uploads/1/3/0/5/130545249/ramigatutikilemifetu.pdf
    • http://investigatingroswell.com/uploads/1/3/0/5/130590618/1408711.pdf
    • http://www.leedsgashelp.com/uploads/1/3/0/6/130621938/pazogimojatuz.pdf
    • http://alexcapitalgroup.com/uploads/1/3/0/6/130604777/wevanufaliwovup_dojomurevil.pdf
    • http://monsterotiqa.com/uploads/1/3/0/6/130620963/dopawoxedupewol_bolafoxav_tajipusujere.pdf
    • http://mianfeisongtiyanjinyulecheng.br3h.com/uploads/1/3/0/2/130288444/130288444.html#complex+number+polar+form+worksheet

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000037e5.bin
eb3eb75404dce3ff5138856fdb64036719bdd557a5f8c062583c2614eddde746
pdf-font-stream PDF embedded font (sfnt) at offset 0x37E5 16072 bytes
font_01_sfnt_off00004c61.bin
f41a317539db954a6dbffea2a11485688ac2b7fedf1024b142c9687c83dc17f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C61 3708 bytes
font_02_sfnt_off00005be4.bin
e77fdda05916689dee7cda8768a8ebdb6df32e659d44792d9003e2061598b631
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE4 8696 bytes