Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af46515b0c196eb…

MALICIOUS

PDF

46.4 KB Created: 2020-04-01 18:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1a626b854a5b500cc11f76d02f0e26ec SHA-1: f13479c2c3df38dcf62ffb3cdfbee06d6b9f198e SHA-256: 7af46515b0c196eb4e0308d835c0a4096bde9506006203cabbbc5a4fd09713dd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a large number of external links, suggesting a link farm or SEO abuse. The document body, though partially corrupted, contains text related to endangered animals and references the creation tool 'wkhtmltopdf'. The primary attack pattern involves directing users to numerous external PDF files hosted across various domains, which could be used for phishing, malware distribution, or further SEO manipulation. No scripts were extracted from this sample.

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://galibellesue.com/uploads/1/3/0/6/130604986/130604986.html#texto+informativo+sobre+los+animales+en+peligro+de+extinci%C3%B3n
    • http://bieresdeparis.com/uploads/1/3/0/7/130738835/8315737.pdf
    • http://prestigeprgroup.com/uploads/1/3/0/3/130313015/6ddaf382.pdf
    • http://sportconsultores.com/uploads/1/3/0/7/130739875/vomorajesupo_tupazifunuj.pdf
    • http://www.txervrodeo.com/uploads/1/3/0/6/130603841/sikegiruxe.pdf
    • http://cjwalkerbooks.com/uploads/1/3/0/6/130620902/45bff42c32e42b.pdf
    • http://antonioalopez.com/uploads/1/3/0/6/130605498/523828ffc0f6d.pdf
    • http://timfitgetfit.com/uploads/1/3/0/6/130603721/6294047.pdf
    • http://qwestllc.com/uploads/1/3/0/6/130620716/boboluwakigekod-lesemuzu-pefaduwejovevas.pdf
    • http://bluechipcleaninglv.com/uploads/1/3/0/9/130969944/8a39037d.pdf
    • http://healingasone.com/uploads/1/3/0/7/130775144/gutira.pdf
    • http://brhrealestatemarketing.com/uploads/1/3/1/4/131406668/92c9e40fc3cfb50.pdf
    • http://liferr.app/uploads/1/3/0/8/130874439/4286369.pdf
    • http://dns1.naobidetroit.org/uploads/1/3/1/1/131164476/1312535.pdf
    • http://miniconsult.org/uploads/1/3/0/6/130604980/pegok.pdf
    • http://skinfetishmedspa.com/uploads/1/3/0/6/130604416/vewutogeneku_baxedekidisol_goveluzapex.pdf
    • http://jayndebate.com/uploads/1/3/1/0/131070852/sujivalarid.pdf
    • http://shopbroadwayskincare.com/uploads/1/3/0/5/130547024/lonijurijip.pdf
    • http://towingi75.com/uploads/1/3/0/5/130550836/3545898.pdf
    • http://nycartsed.com/uploads/1/3/0/7/130776223/renamizadiwolipaj.pdf
    • http://ug-mmovn.com/uploads/1/3/0/3/130323814/2963742.pdf
    • http://give-n.com/uploads/1/3/0/8/130873955/pobiforivojimazibu.pdf
    • http://liqourlawvt.com/uploads/1/3/0/6/130621803/98ef7d8df18b3.pdf
    • http://madame-louise.com/uploads/1/3/0/2/130288514/josuzesumipe_petamuxosakobab.pdf
    • http://ooredoogroup.net/uploads/1/3/0/4/130476513/d020e56.pdf
    • http://jmj.construction/uploads/1/3/0/8/130814591/1218765.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_off0000864f.bin
e155c3f48589f611aacd33223e1b5f77dde1f90dee5d520e2938de583f072a6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x864F 9764 bytes

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