Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc08f67c6df2866…

MALICIOUS

PDF

37.0 KB Created: 2020-04-01 23:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ce5cc62b07de9bb557e76f0ee997ccaa SHA-1: d33fb6ee1dad6b6ef519a0818288049d1208c8a2 SHA-256: fbc08f67c6df2866967e98c5872bdfad2fc55bea6d2a816b8ece3aac6b8e19a5
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of external links, a technique often used for SEO spam or to distribute malicious payloads. The PDF_SEO_LINK_FARM heuristic firing indicates a mass of external PDF links, and the ML classifier strongly suggests malicious intent. The document body itself is heavily obfuscated but contains URLs that are likely part of this link farm.

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://kenraye.net/uploads/1/3/0/8/130813787/130813787.html#docs+shoes+suede
    • http://mamaintheraw.com/uploads/1/3/0/6/130621979/kajozogazudifeluj.pdf
    • http://christopherpezformayor.com/uploads/1/3/0/4/130483805/daloxarovaf.pdf
    • http://thelongevityclock.com/uploads/1/3/0/6/130639479/6e96bb1637d.pdf
    • http://mimillari.com/uploads/1/3/0/4/130435835/9041847.pdf
    • http://dasoulolife.com/uploads/1/3/0/7/130738569/7922909.pdf
    • http://asascraft.com/uploads/1/3/0/5/130590278/gamux.pdf
    • http://anotherhunnygoddessproduction.com/uploads/1/3/1/3/131383624/794e42c0210.pdf
    • http://carseatkids.com/uploads/1/3/1/1/131164552/5aa76cb0ff.pdf
    • http://texca.in/uploads/1/3/0/6/130640109/0e400e3e9.pdf
    • http://charlesheiner.net/uploads/1/3/0/7/130776516/wagut-dikonefosewolem.pdf
    • http://ernstconcreteandmasonryinc.com/uploads/1/3/0/7/130776150/boguxeze.pdf
    • http://atlanticpropertymanagement.net/uploads/1/3/0/2/130287883/2946202.pdf
    • http://newlifewarehouse.com/uploads/1/3/0/9/130969332/bowuxanavem_lisutobida_kirewog_kuzikaki.pdf
    • http://openheartshealingarts.com/uploads/1/3/0/5/130589337/sunapumuva_pikizopid_fewez.pdf
    • http://elderlawtampabay.com/uploads/1/3/0/5/130551726/vajaro-tazufadabanev-tavejov-rujilek.pdf
    • http://polaricebathdelights.com/uploads/1/3/0/6/130639249/4174045.pdf
    • http://theteaatelier.com/uploads/1/3/0/6/130621524/630315.pdf
    • http://hoopferservices.com/uploads/1/3/0/3/130324167/xagofipemodarefigire.pdf
    • http://electleannpierce.com/uploads/1/3/0/5/130551836/0f9d42f66ff6.pdf
    • http://waterbaptised2017.com/uploads/1/3/0/6/130639768/3178278.pdf
    • http://cva360.com/uploads/1/3/0/9/130968976/firusasuwok.pdf
    • http://entretiendeneigementolly.com/uploads/1/3/1/4/131452811/kefomida.pdf
    • http://bartlitbeckllp.com/uploads/1/3/0/7/130739802/87db241dc663b.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_off000065d4.bin
9b9760e0ca84b73a51d19f437ca1fee57159ac98c3b1385fc24631baca3e4227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D4 8448 bytes

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