Malicious PDF — malware analysis report

Static analysis result for SHA-256 620d885e614ddf40…

MALICIOUS

PDF

29.3 KB Created: 2020-05-13 12:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d7f325b4489ae5c8b24e272ae9700fb7 SHA-1: bc2d5ff940503cb5c5c09691cfafda18230b5d6d SHA-256: 620d885e614ddf40322481fb3f718b94c115d39a012e4fd21986de007a1598d9
116 Risk Score

Malware Insights

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

The PDF file is identified as malicious by an ML classifier and exhibits characteristics of an image-based lure, typical for phishing campaigns. It contains a large number of external links, suggesting it's part of a link farm designed to distribute malicious content or redirect users to phishing sites. The document body itself is heavily obfuscated and contains embedded URLs, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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 29 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://spectrumherniaclinic.com/uploads/1/3/0/5/130538953/130538953.html#2005+volkswagen+beetle+convertible+manual
    • http://yucaxan.com/uploads/1/3/0/2/130289585/kepade.pdf
    • http://meadowlandslogisticscenter.com/uploads/1/3/0/5/130589042/1e2e55d.pdf
    • http://my805dogs.com/uploads/1/3/0/7/130739379/8559189.pdf
    • http://marikarudy.com/uploads/1/3/0/4/130483158/d5858d56a6c1c1.pdf
    • http://poppysjerky.com/uploads/1/3/1/3/131380160/ralam.pdf
    • http://wbhsmusicboosters.com/uploads/1/3/0/5/130589316/pozivi.pdf
    • http://en.coletsos.gr/uploads/1/3/0/5/130551464/b8ea48a37fcd1.pdf
    • http://wrinkleddogs.com/uploads/1/3/0/5/130551416/luwebenisomaf.pdf
    • http://capturedmomentsbytammy.com/uploads/1/3/0/7/130775382/d17b051.pdf
    • http://creepycreecher.com/uploads/1/3/1/3/131398097/dufokorenokebano.pdf
    • http://celticswanart.com/uploads/1/3/0/7/130775009/buratenesab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050a1.bin
119f0de6fa89c651c61d6f5bd0215ed40f322fd30004f230154159339b07eae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A1 7400 bytes

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