Malicious PDF — malware analysis report

Static analysis result for SHA-256 791e62cf92ea3480…

MALICIOUS

PDF

16.9 KB Created: 2020-04-03 00:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e4d6b323bfbe65699ef75d889f3d74c6 SHA-1: 729777380ea9981e2090f6f53608095ee90e6f05 SHA-256: 791e62cf92ea3480383be02e0dacf224a62bfaf6266675bddb65f3c7261a3a2a
154 Risk Score

Malware Insights

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

This PDF document is designed as a lure, presenting itself as an image to trick users into clicking a link. The document contains a large number of algorithmically generated external PDF links, with one specific link identified as algorithmically generated and likely malicious. The presence of these links suggests an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 5

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 16 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://faicseating.com/uploads/1/3/0/8/130814423/130814423.html#zilma+de+oliveira+-+educa%C3%A7%C3%A3o+infantil+fundamentos+e+m%C3%A9todos
    • http://chaorenconstructionsltd.com/uploads/1/3/0/7/130775675/3038336.pdf
    • http://bigislandweddingsandevents.com/uploads/1/3/1/4/131406798/ziwidixa.pdf
    • http://completecarechiropractictables.com/uploads/1/3/0/5/130539672/e3a62679c0d.pdf
    • http://brilliantlyyou.net/uploads/1/3/1/3/131379247/pugape.pdf
    • http://pegplomberiesanitaire.com/uploads/1/3/0/4/130476144/3a20a.pdf
    • http://nexuschapel.org/uploads/1/3/1/0/131070375/pitoruzipidalixezul.pdf
    • http://74-123-77-80.mgwnet.com/uploads/1/3/0/7/130775543/7842662.pdf
    • http://morishoppe.com/uploads/1/3/0/2/130291646/0634ea16b3fc6.pdf
    • http://hcengravedgifts.com/uploads/1/3/0/7/130776021/3415369b8e0d0.pdf
    • http://arizonacbddistributors.com/uploads/1/3/0/4/130476468/1fe1b1.pdf
    • http://presents-with-purpose.com/uploads/1/3/0/3/130323375/lifaxobosuzavil_zazariso_dotodopubarexu_xigubidawujesob.pdf
    • http://fadausa.org/uploads/1/3/0/3/130313192/xijefikida.pdf

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