Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc006fccb6eb4c25…

MALICIOUS

PDF

37.9 KB Created: 2020-03-15 01:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 18a503ca338da59327f46f4c22ed609f SHA-1: e1c7e17565be2207c1c2a06fef495f84ba71bf54 SHA-256: bc006fccb6eb4c25a5830ff5088b584656f40457bc21c5f1084f7b0541678900
96 Risk Score

Malware Insights

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

This PDF document was flagged by an ML classifier as malicious. It contains a large number of external links, many of which appear to be SEO-optimized URLs pointing to other PDF files. The document body text is garbled, but the presence of numerous external links suggests a redirection or link farm strategy. The primary attack pattern involves directing users to a multitude of external websites.

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://hgvmanager.com/uploads/1/3/0/7/130739006/130739006.html#sample+bio+data+form+for+students
    • http://lpah.preview.pethealthnetworkpro.com/uploads/1/3/0/6/130621682/dumubipegafesoduko.pdf
    • http://derekboggs.com/uploads/1/3/0/7/130775002/1936035.pdf
    • http://ramosironworks.net/uploads/1/3/0/5/130542813/votinajaxosuluv.pdf
    • http://oidzo.net/uploads/1/3/0/3/130323493/68fa50cd.pdf
    • http://theravensthree.com/uploads/1/3/0/7/130775029/1777071.pdf
    • http://ns.bethalto.org/uploads/1/3/0/4/130488829/c046298602c6.pdf
    • http://twistingtrailsandtales.com/uploads/1/3/0/2/130289611/pofunize_karawor_vibux_kaxojomibiwow.pdf
    • http://petereliason.net/uploads/1/3/0/2/130271009/9021478.pdf
    • http://ministryops.net/uploads/1/3/0/8/130874376/0ed06050eca.pdf
    • http://campuscircle.org/uploads/1/3/0/2/130271179/tasuranewujuni.pdf
    • http://mygriffinranch.com/uploads/1/3/0/3/130379315/41d0cf6213a6.pdf
    • http://jesusplusnothing.net/uploads/1/3/0/7/130775630/4755511.pdf
    • http://omaiorlegado.com/uploads/1/3/0/4/130488530/5622300.pdf
    • http://elliotfisher.com/uploads/1/3/0/4/130476921/gizifugosig_nevaxu_wafomewida_gobakan.pdf
    • http://www.pleasureslaves.com/uploads/1/3/0/4/130477864/tekuvipoz.pdf
    • http://musclememorygolf.com/uploads/1/3/0/4/130476205/7606568.pdf
    • http://mail.scarboroughjiujitsu.com/uploads/1/3/0/4/130493143/gifup.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_off00006dde.bin
c9040775f9ccf1d1f6e1483dfb039af85173dd9a84c982bf4314f041334453d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 7236 bytes

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