Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca5d48a1df7f7bf…

MALICIOUS

PDF

30.8 KB Created: 2020-06-14 19:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea1ae963173711ffa5b43f3611efb211 SHA-1: ea11272ca5b3c3461b8c20415a371e167145a3c8 SHA-256: 0ca5d48a1df7f7bfe56909d0ee54f20807aca1ebdf190fd888d6e35295e9f754
116 Risk Score

Malware Insights

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

The PDF is identified as a malicious image-only lure, typical of phishing attempts. It contains numerous external links, many of which point to PDF files with numeric slugs, suggesting a link farm designed to manipulate search engine results or host malicious content. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs further supports a malicious intent, likely to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 30 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://masaitohomesofficial.info/uploads/1/3/1/3/131383721/131383721.html#agilent+4284a+manual
    • http://fitzngiggles.co.uk/uploads/1/3/0/7/130775337/6607635.pdf
    • http://magical-fun.com/uploads/1/3/0/8/130814343/75c43.pdf
    • http://latelierdelhorloge.com/uploads/1/3/0/5/130589240/lutamubagufe.pdf
    • http://wmochrist.org/uploads/1/3/0/9/130969259/4926310.pdf
    • http://samwyattart.com/uploads/1/3/0/3/130323997/168a913490.pdf
    • http://creativemeartclub.com/uploads/1/3/1/4/131453915/wowinusokawi-dapipafope.pdf
    • http://experiencedbuilders.org/uploads/1/3/1/6/131606431/9945606.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://rigubagos619757990.files.wordpress.com/2020/06/51978377639.pdf
    • https://kifajeli120449415.files.wordpress.com/2020/06/fugapagosasavujo.pdf
    • https://jowifigubug.files.wordpress.com/2020/06/zezawogalo.pdf
    • https://sawowutiv.files.wordpress.com/2020/06/kiraletebovinofokumeb.pdf
    • https://rizefoxug.files.wordpress.com/2020/06/60003356801.pdf
    • https://wajojewo.files.wordpress.com/2020/06/joxokufidupedalupesavaj.pdf
    • https://ruxidun.files.wordpress.com/2020/06/60049136364.pdf
    • https://xafavir.files.wordpress.com/2020/06/xatosesezesoguko.pdf
    • 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_off00005501.bin
c9026aa4c66e603bf9bf8bc3f03a353c44fb22bd1088b9324cb67c9b2b2689c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5501 7864 bytes