Malicious PDF — malware analysis report

Static analysis result for SHA-256 2923ed6aa4e3ee65…

MALICIOUS

PDF

33.0 KB Authoring application: Karbon First seen: 2020-08-10
MD5: e948fa39e2c142f5d5faad4da6377670 SHA-1: 67ecae9a9d3bf566d2ff21ba0e5124dbbc3a7277 SHA-256: 2923ed6aa4e3ee65d360ad39761a537e41cfc5ebdb8642de3e1abc80516bab2f
192 Risk Score

Malware Insights

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

This PDF file exhibits a critical heuristic firing for a PDF_SEO_LINK_FARM, indicating it contains a large number of external links to other PDF files. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URLs suggest a campaign focused on redirecting users to potentially malicious content hosted on numerous domains, likely for SEO manipulation or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://www.pillowqueens.net/uploads/1/3/0/7/130775337/9107853.pdf In PDF document text
    • http://suzanneandjustinforever.com/uploads/1/3/0/3/130379231/2830576.pdfIn PDF document text
    • http://brianherrick.net/uploads/1/3/0/7/130776046/kowezot_sukafix.pdfIn PDF document text
    • http://glennsoriginalart.com/uploads/1/3/0/6/130620828/f2f525f8c03.pdfIn PDF document text
    • http://www.lakecityfamilytherapy.com/uploads/1/3/0/2/130274097/narepuwuzajonusi.pdfIn PDF document text
    • http://www.wii-women-pilot.org/uploads/1/3/0/9/130969663/4827.pdfIn PDF document text
    • http://mikrobiyotatesti.com/uploads/1/3/0/6/130620840/2505170.pdfIn PDF document text
    • http://kiemtratenmien.net/uploads/1/3/0/4/130488580/vigutajasaxage-jojulavu-pusonujazudu.pdfIn PDF document text
    • http://robertmyrick.com/uploads/1/3/0/5/130590380/913d73e32df6b08.pdfIn PDF document text
    • http://www.bpaleogranola.com/uploads/1/3/0/7/130740128/c8481965308a0dc.pdfIn PDF document text
    • http://thegeorgiaquailhunt.com/uploads/1/3/0/5/130547576/devosodakeze.pdfIn PDF document text
    • http://revolt.775marketing.com/uploads/1/3/0/6/130604254/0ca99daf0444.pdfIn PDF document text
    • http://alanmaps.com/uploads/1/3/0/8/130813032/minovalojutasuvu.pdfIn PDF document text
    • http://adamjroe.com/uploads/1/3/0/5/130551202/2a2fbc70.pdfIn PDF document text
    • http://boathousesushi.com/uploads/1/3/0/8/130814926/bugakafufoxibigojepi.pdfIn PDF document text
    • http://purposeisbaeshop.com/uploads/1/3/0/4/130435633/b42a19.pdfIn PDF document text
    • http://denverbikeblog.com/uploads/1/3/0/6/130621032/7926972.pdfIn PDF document text
    • http://cnchomecrafts.net/uploads/1/3/0/4/130476908/1277631.pdfIn PDF document text
    • http://lifebeyondthearc.com/uploads/1/3/0/2/130288307/lipekadev.pdfIn PDF document text
    • http://amandamayberry.com/uploads/1/3/0/7/130775862/3406374.pdfIn PDF document text
    • http://norwalkunitedmethodistchurchiowa.com/uploads/1/3/0/2/130288318/283193.pdfIn PDF document text
    • http://webdisk.healingscarredhearts.com/uploads/1/3/0/3/130379411/69f16abe625ccce.pdfIn PDF document text
    • http://www.mimbestore.com/uploads/1/3/0/9/130969062/gomipa_julisadarebape_juxupe.pdfIn PDF document text
    • http://devonwashingtondesign.com/uploads/1/3/0/2/130289620/54075af8b78dab.pdfIn PDF document text
    • http://premieraccountadvisor.com/uploads/1/3/0/7/130739492/2618971.pdfIn PDF document text
    • http://toscomusicstudios.com/uploads/1/3/0/5/130590457/130590457.html#reading+comprehension+for+beginners+book+pdfIn PDF document text
🗂 Part of campaign: fatsom.com 7 samples

Related samples 5

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_off00001e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0F 7116 bytes
SHA-256: 83a0613e5d21ef882126a919b9fc1206bf4fd8096dc40571352f9479df391910

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