Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f757a551510d7b4…

MALICIOUS

PDF

36.5 KB Authoring application: Pdftk
MD5: 72d315947310e52f4a38c4b0681626ec SHA-1: c075e1148d682df5dd9dbd68af202f2e7729503a SHA-256: 7f757a551510d7b409ce836d30d24faf944ab73d8a0b55be4acec22ab01fd369
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm, containing numerous embedded URLs that point to other PDF documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body's content is garbled and appears to be a lure, possibly related to game cheats, which is inconsistent with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://northwestclubracer.com/uploads/1/3/0/4/130490006/4692c2.pdf
    • http://breadin5minutes.com/uploads/1/3/0/7/130776070/7198664.pdf
    • http://rockymtnoverlandexpo.com/uploads/1/3/0/5/130551245/5af7f01111c.pdf
    • http://marzenaugorna.pl/uploads/1/3/0/3/130379162/dagogamezaj.pdf
    • http://skinweekly.com/uploads/1/3/0/6/130620340/losobobufeg_vifojokadaxuled_sapiwazotapebi_disok.pdf
    • http://healinggenerationsneurofeedback.com/uploads/1/3/0/4/130435763/5760450.pdf
    • http://willsmovingtest.club/uploads/1/3/0/2/130287991/zekogevotelip_jotizupunu_joved.pdf
    • http://ozarknaturalpaneling.com/uploads/1/3/0/5/130588934/ruludafiseko-nilojewagak.pdf
    • http://cairfarestore.com/uploads/1/3/0/5/130538981/wegexisodog.pdf
    • http://drrichardarcher.com/uploads/1/3/0/6/130640027/9786183.pdf
    • http://thecommonist.party/uploads/1/3/0/8/130874472/kumobadudizinire.pdf
    • http://www.lawintechdiversity.com/uploads/1/3/0/6/130605174/0857440ce.pdf
    • http://arkstore.shop/uploads/1/3/0/6/130621100/4838844.pdf
    • http://centralemag.com/uploads/1/3/0/6/130605263/mumes.pdf
    • http://azzaziphoto.com/uploads/1/3/0/5/130590596/4164632.pdf
    • http://atconsultancy.org/uploads/1/3/0/2/130287462/65f2e0b5.pdf
    • http://vetpoint.us/uploads/1/3/0/5/130589171/4645329.pdf
    • http://www.overthecreek.blog/uploads/1/3/0/6/130603819/052641aa387.pdf
    • http://nobupaloalto.devsite-1.com/uploads/1/3/0/6/130639744/130639744.html#gta+5+money+cheats+xbox+360+offline

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003090.bin
b9ad845ba7d2a29e1967442c6eec83997a67739a62f2ffe421c3b5b2c0e09ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3090 7976 bytes

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