Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dac8aab84c8a9ab…

MALICIOUS

PDF

60.7 KB Created: 2020-03-12 14:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2d52a9689857dda2c2771dc4248aebbc SHA-1: b14a66b14c0d52306fb06f70e2087701c830d196 SHA-256: 5dac8aab84c8a9ab0e199e97cb46439a977ac0c00a06a82a1d3ce2ad0bfdd5e8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body is heavily obfuscated, but the presence of numerous URLs points to a content-distribution or SEO-poisoning attack.

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://kingshotelsgroup.devsite-1.com/uploads/1/3/0/6/130639462/130639462.html#brucella+susceptibility+testing
    • http://www.endlessfloater.com/uploads/1/3/0/8/130814387/tajabidodujak-lonejo-fagutabejow-dabakafera.pdf
    • http://maryamkeshavarz.co.uk/uploads/1/3/0/6/130620233/kiriwojenavajavezotu.pdf
    • http://royal-honeys.com/uploads/1/3/0/2/130291702/31dde1.pdf
    • http://southernbredpups.com/uploads/1/3/0/6/130605358/fitinafujeri-xivoxanafiwibir-bebaxinusuzed-fatad.pdf
    • http://philia-stragetic-consulting.com/uploads/1/3/0/5/130542870/9351862.pdf
    • http://prophecyaussies.com/uploads/1/3/0/5/130543377/ridakef_filuxipoxesu_wiwevopirabo.pdf
    • http://backsideofgod.com/uploads/1/3/0/8/130874111/jivuwaziv.pdf
    • http://susanfochs.com/uploads/1/3/0/5/130545800/kemukedituxeta.pdf
    • http://first4u.net/uploads/1/3/1/0/131070187/6302463.pdf
    • http://shop.claymakers.org/uploads/1/3/0/5/130539517/7553705.pdf
    • http://hostmaster.banburi.nl/uploads/1/3/0/2/130288761/035b5388b.pdf
    • http://www.crystalkomics.com/uploads/1/3/0/7/130775400/reraxugetagosibose.pdf
    • http://realfamilycamping.com/uploads/1/3/0/7/130739061/71d7d59.pdf
    • http://myrichardsonrealty.com/uploads/1/3/0/3/130313360/ruxubenanagaloweti.pdf
    • http://s6wraps.com/uploads/1/3/0/4/130476491/dawote-mawabugedasax-vezosanojosulu.pdf
    • http://atlshoebank.com/uploads/1/3/0/2/130287502/a836c2fc0.pdf
    • http://wrcustomguitars.net/uploads/1/3/0/4/130476006/gegubijumara.pdf
    • http://chalkadoodles.com/uploads/1/3/0/8/130814014/rumevo_kilit.pdf
    • http://shilohreunion.com/uploads/1/3/0/5/130590357/305622.pdf
    • http://humblebundleofjoy.com/uploads/1/3/0/6/130621110/2794327.pdf
    • http://awarenessinsightministry.org/uploads/1/3/0/6/130605292/6825821.pdf
    • http://fantasynfun.live/uploads/1/3/0/6/130620401/6092149.pdf
    • http://team5-toyota.com/uploads/1/3/0/7/130775518/069529099a3657.pdf
    • http://www.alevelphysicsrevision.com/uploads/1/3/0/6/130639635/c2b5e8e8767.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_off0000c018.bin
4a069313a35d69222a02321cdea640df5c12edfddf1ce6994fa1bb820437052e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC018 10676 bytes

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