Malicious PDF — malware analysis report

Static analysis result for SHA-256 811435751d78b843…

MALICIOUS

PDF

32.0 KB Authoring application: Karbon First seen: 2020-09-24
MD5: 1963c78e699e6cd47c365fab461bc4d1 SHA-1: f47a234d6ee0988959629ef884a03ba3ed29fc59 SHA-256: 811435751d78b8434fce3b5dd0fd4e99f9e2e9f6c6e20b69f9cccdfbd8be680e
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links to external PDF files hosted on various domains, indicative of a link farm or SEO manipulation tactic. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links point towards a phishing or malicious redirection attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://eliteculinarychef.com/uploads/1/3/0/6/130604254/3545aa.pdf In PDF document text
    • http://nationalpostcards.ie/uploads/1/3/0/4/130476709/1dd91.pdfIn PDF document text
    • http://caffiechang.com/uploads/1/3/0/6/130620793/6028167.pdfIn PDF document text
    • http://rudywalkerofficial.com/uploads/1/3/0/6/130639580/af9052c2d1becf0.pdfIn PDF document text
    • http://yayaskitchen.net/uploads/1/3/0/4/130435518/kefalorijavenaxerig.pdfIn PDF document text
    • http://mistersac.com/uploads/1/3/0/7/130775704/fb9d9ebe6d53.pdfIn PDF document text
    • http://serenielle.com/uploads/1/3/0/7/130775672/fuwesu.pdfIn PDF document text
    • http://hostmaster.raspberryhair.co.uk/uploads/1/3/0/6/130604958/5585318.pdfIn PDF document text
    • http://aprilcable.org/uploads/1/3/0/7/130739878/665395.pdfIn PDF document text
    • http://onlinemarketingmastermindgroup.com/uploads/1/3/0/6/130639539/kuxifusaledebenemem.pdfIn PDF document text
    • http://wcd-1199sab5.mgh-r.ch/uploads/1/3/0/5/130550836/130550836.html#descriptive+correlational+design+methodIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2974 7052 bytes
SHA-256: 4cdae39937bb15f9e5683b51d26e5ea205bcbb36de128d8b51ed46bdf998057b

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