Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab118acf2df6fd0…

MALICIOUS

PDF

43.4 KB Created: 2020-04-16 21:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 303ef3cce0cd5eb23252cc824d38bc47 SHA-1: 565376f85529d7356f417a49c47a80b99ac883bd SHA-256: aab118acf2df6fd06c2b0ab4d0a5a75e9510cbe20e6b931c18c763e7fe0ea638
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, indicating a link farm or SEO spam tactic. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains keywords related to roofing sheets, suggesting a lure to disguise the malicious intent of directing users to potentially harmful 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://elinetlouicius.com/uploads/1/3/0/8/130874023/130874023.html#corrugated+steel+roofing+sheets+wickes
    • http://emporiobs.com/uploads/1/3/0/6/130621708/7959499.pdf
    • http://crystalskyvinyldesigns.com/uploads/1/3/0/5/130538939/ffee00.pdf
    • http://akidzway.com/uploads/1/3/1/6/131637054/6427258.pdf
    • http://365dailywalk.com/uploads/1/3/0/7/130775795/pojagitolo_pepovunuziru_tojeposuxaj_lenebitufezudu.pdf
    • http://baradesignsandleasing.com/uploads/1/3/1/0/131069870/zaguni_fidowafuzado.pdf
    • http://justicecollaborativeatcornell.com/uploads/1/3/0/2/130271259/goveke.pdf
    • http://atlantacenterforhypnotherapy.com/uploads/1/3/0/5/130589309/nokizifidorezajarome.pdf
    • http://gcmotorcycletraining.com/uploads/1/3/0/4/130475909/wurezivafavip_linomebilawazox_lalep_fudegu.pdf
    • http://foryourearstodrink.com/uploads/1/3/1/4/131437312/menifigopatode.pdf
    • http://roaming.studio/uploads/1/3/0/8/130814293/pejuwipejifetof.pdf
    • http://enfimcasados.com/uploads/1/3/0/4/130488114/c7d15533.pdf
    • http://omegaresearch.co/uploads/1/3/0/4/130483307/sikasizivusonen_rizupem_dipen.pdf
    • http://cajunheavenartandmore.com/uploads/1/3/0/4/130483402/lominejesojutexipo.pdf
    • http://geoforcetexas.org/uploads/1/3/0/3/130323415/398f2203a4fa.pdf
    • http://atlantacenterforhypnotherapy.co
    • 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_off0000813a.bin
2e5ce0739b86e3851228febba59224e05387e69a5eee1b83ba4d877d2cc1f4f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x813A 8296 bytes

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