Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e3254dd983d05e…

MALICIOUS

PDF

39.0 KB Created: 2020-03-06 16:13:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 098c6b7b14868d9fa8f78e198c2e827d SHA-1: ae1e1161324d1e5252208295e0d93e454e37c21f SHA-256: 57e3254dd983d05eb752cccbc97c7e339171b003451322ed332af09f6d673018
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be SEO-optimized lures. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a link farm hosted on various domains, likely for traffic monetization or to serve further malicious content. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://2g625.slpny.com/uploads/1/3/0/2/130289669/130289669.html#neilmed+sinus+rinse+how+much+water
    • http://ugencoaching.com/uploads/1/3/0/7/130776265/noduz.pdf
    • http://hostmaster.routestowork.co.uk/uploads/1/3/0/6/130621746/1917140.pdf
    • http://www.atelierturner.fr/uploads/1/3/0/6/130605501/xoxab_xawode_xexuv.pdf
    • http://liuxueshengdaigou.com/uploads/1/3/0/4/130493714/voxubowos_latagapifen.pdf
    • http://jeneemusic.net/uploads/1/3/0/5/130538891/pedadezojude.pdf
    • http://yeovilbeekeepers.org/uploads/1/3/0/5/130588463/8327155.pdf
    • http://boxcop.io/uploads/1/3/0/5/130590383/3632930.pdf
    • http://www.enerselect.net/uploads/1/3/0/7/130776592/126520.pdf
    • http://www.lionsclub5k.com/uploads/1/3/0/3/130379370/tafebosefasune_silikiduga_ragejefosala_tututoropaj.pdf
    • http://aguiarassessoria.com/uploads/1/3/0/2/130289625/jawuwobote.pdf
    • http://frankiesaysrelax.nyc/uploads/1/3/0/4/130493816/raror_ganutajapamo.pdf
    • http://missprisstea.com/uploads/1/3/0/6/130605393/zoketi.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ede.bin
4a842b5740e0d00826affbdc50adeba2f65f7521c6eff6462af35a131abc1a17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDE 8620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.