Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fea9a331d3e470…

MALICIOUS

PDF

27.6 KB Created: 2020-04-03 06:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0fdfb5d482e11859ff0dad339e6f560c SHA-1: f0e1bafc9db6e6fd3fca6abd9f540376e693acc1 SHA-256: 80fea9a331d3e4701c6a8b69412381c159b0607a95f18f836f73b67b7bec370d
114 Risk Score

Malware Insights

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

The PDF document is identified as malicious by an ML classifier and exhibits characteristics of a phishing lure, including being image-heavy with a clickable action. The document body contains multiple external URLs, with the primary one being http://taylorsbeautyroom.com/uploads/1/3/1/3/131379420/131379420.html#box+set+harry+potter+libros+espa%C3%B1ol. The presence of a large number of external PDF links suggests a link farm or redirection mechanism to further distribute malicious content.

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 27 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://taylorsbeautyroom.com/uploads/1/3/1/3/131379420/131379420.html#box+set+harry+potter+libros+espa%C3%B1ol
    • http://www.runsoft.co.uk/uploads/1/3/0/7/130738567/d643f.pdf
    • http://gettingoffauto.com/uploads/1/3/0/2/130291712/bamodinuronot.pdf
    • http://dignityandjll.com/uploads/1/3/0/7/130739964/3696891.pdf
    • http://joshuatammaro.media/uploads/1/3/1/4/131409275/dozowopirigokim.pdf
    • http://constelmag.com/uploads/1/3/0/6/130639682/94011.pdf
    • http://ejfunartstudio.com/uploads/1/3/1/0/131071231/goxoguteweki.pdf
    • http://cnichollswriting.com/uploads/1/3/0/8/130874265/7568092.pdf
    • http://channingbenjamin.com/uploads/1/3/1/3/131383673/dowatexoziwipevipet.pdf
    • http://reaganricossa.com/uploads/1/3/0/7/130740025/lomekomu-tixikuma-kiwosupemuwag.pdf
    • http://claystransmissions.com/uploads/1/3/0/6/130639841/5008575.pdf
    • http://nickmofoto.com/uploads/1/3/0/3/130313529/8aa06f51b.pdf
    • http://csauto2.com/uploads/1/3/0/6/130604729/c1e13bb5.pdf
    • http://smciner1.com/uploads/1/3/0/5/130589269/guxakafimeje.pdf
    • http://theshedcamp.com/uploads/1/3/1/4/131437508/futot.pdf
    • http://nkbuildingconstruction.com/uploads/1/3/0/8/130813632/5224113.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ff0.bin
5e0835c67895a74c971e6f2cf16db4a5f6679a3522bc88b8980b66a1f8097421
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF0 5308 bytes