Malicious PDF — malware analysis report

Static analysis result for SHA-256 352ef1ca9d727761…

MALICIOUS

PDF

35.4 KB Created: 2020-03-23 17:06:38 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f29814269fa2d2d2f0ae45721f84beeb SHA-1: 60a9e7088153c5ff2d241e5ba6d4576028d4cc4f SHA-256: 352ef1ca9d727761b936410ddc903087948304901491f4250105d60eb78911fb
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but also includes a URL that appears to be a lure for a specific product, suggesting a phishing or scam attempt. The primary function appears to be directing users to a network of linked 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://ltobmusic.com/uploads/1/3/0/2/130291785/130291785.html#bose+acoustic+wave+music+system+ii+ebay
    • http://webdisk.elizabethlmiles.com/uploads/1/3/0/2/130292110/dimevezo.pdf
    • http://colineardesign.com/uploads/1/3/0/5/130588206/bunogu.pdf
    • http://doodadsandwhatnots.com/uploads/1/3/0/9/130969980/xefirufidupon-logexonolu.pdf
    • http://www.jolicacargo.pl/uploads/1/3/0/9/130969954/85799e7fe7634b2.pdf
    • http://shop.kissmedia.co.nz/uploads/1/3/0/6/130604758/vogotofitiwujole.pdf
    • http://cht.kamenrider.ca/uploads/1/3/0/8/130874318/99ec03a93.pdf
    • http://www.yachtsteak.com/uploads/1/3/0/4/130476804/2fcb43e.pdf
    • http://www.tourforthecure.ca/uploads/1/3/0/7/130739371/ce5c444df80.pdf
    • http://www.garymadeira.com/uploads/1/3/0/5/130588517/54ec59b1d2fa.pdf
    • http://mtmusicservices.com/uploads/1/3/0/7/130738638/laxawutisolamivon.pdf
    • http://teachingthattransforms.net/uploads/1/3/0/6/130605353/11a2d51ad2b370.pdf
    • http://www.phvolo.com/uploads/1/3/0/7/130775921/lumawopunirewojafet.pdf
    • http://www.aadunsustainability.com/uploads/1/3/0/4/130477083/madotus_sazigedoveva_tawoka.pdf
    • http://bealegacybuilder.com/uploads/1/3/0/3/130313434/vodoru_dopovusi_toxevozunune_datem.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_off0000671f.bin
fcc9ddeafdf5f8f1b6afb6c340898f4040fa191fdbea96e46fcc5464cc4b147b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671F 6316 bytes

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