Malicious PDF — malware analysis report

Static analysis result for SHA-256 8612753a3a6be5f3…

MALICIOUS

PDF

38.7 KB Authoring application: Mobipocket Creator First seen: 2020-09-24
MD5: 81f711a89d91c2615bc61480b7c09d16 SHA-1: f91c33d0ae301dfbc149f5f68c98f352d4fbbc8c SHA-256: 8612753a3a6be5f377d35bc9d03f64715d461f5d6d4baeeae93efe7e5051701f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files across various domains, indicating a link farm or content distribution network. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a machine learning classifier also flagged it as malicious. The embedded URLs are the primary indicators of malicious activity, suggesting a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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://naturalrobotics.net/uploads/1/3/0/5/130550888/fobab.pdf In PDF document text
    • http://bolivien-bergwandern.de/uploads/1/3/0/2/130289756/5462504.pdfIn PDF document text
    • http://summersolsticeretreat.co.uk/uploads/1/3/0/7/130776304/vurakevakebodukuma.pdfIn PDF document text
    • http://sandybailes.com/uploads/1/3/0/5/130544437/gonaxagobitawawofex.pdfIn PDF document text
    • http://nfondy.net/uploads/1/3/0/7/130738722/gazojejizuj.pdfIn PDF document text
    • http://tulsaeats.com/uploads/1/3/0/5/130551491/ratonovokuvimuli.pdfIn PDF document text
    • http://reformasintegralesproconse.com/uploads/1/3/0/2/130270743/5194515.pdfIn PDF document text
    • http://steelcityselectsoftball.com/uploads/1/3/0/3/130324158/7ce57fdfe2c7.pdfIn PDF document text
    • http://olympicdiscoverytrail.net/uploads/1/3/0/5/130539265/e3f95d.pdfIn PDF document text
    • http://ifloveconservation.com/uploads/1/3/0/4/130475955/6af17f.pdfIn PDF document text
    • http://teamworkprofiles.com/uploads/1/3/0/4/130483649/pexebabebebipuzuf.pdfIn PDF document text
    • http://dfwvenom.com/uploads/1/3/0/5/130588267/fidopok.pdfIn PDF document text
    • http://74-123-75-191.mgwnet.com/uploads/1/3/0/5/130589342/130589342.html#anaesthesia+and+intensive+care+a-z+6th+edition+pdfIn PDF document text
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3090 4068 bytes
SHA-256: 66495800c3033db752395888c57a2472d7780c6e20f93c23d8607484346c200d
font_01_sfnt_off00003fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FA0 7708 bytes
SHA-256: 044a590e7e37e39ff72f28c1a25637d2626f371da917525c2df0ca5689018612

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