Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca9af3b2c8ea80b…

MALICIOUS

PDF

41.9 KB Created: 2020-03-09 03:32:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2c26175c8595ed92c25e518b7e4126e0 SHA-1: 33fdbb093b62f630c1588acee0ab10e558cd7238 SHA-256: aca9af3b2c8ea80b2f0da909ca7cadfa1087a0ce21bc67d81fc73b9a5f2ec0f1
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO poisoning attack. The embedded document body text also contains a URL, which is likely part of the lure. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to potentially harmful external content.

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://betelpaintco.com/uploads/1/3/0/9/130969414/130969414.html#congestive+heart+failure+treatment+webmd
    • http://cpanel.fitdjc.com/uploads/1/3/0/4/130488227/187695bb2f60.pdf
    • http://brightcloud.us/uploads/1/3/0/7/130775509/nujomi-wovapovose-femanagenejuku.pdf
    • http://sarahleesy.com/uploads/1/3/0/7/130775522/dekalorogeris.pdf
    • http://minutemengundogs.com/uploads/1/3/0/5/130550681/2238a9dbc9a206.pdf
    • http://www.heidisjourneyofhope-org.davidmichaeldesigns.com/uploads/1/3/0/6/130604779/wutemavuz.pdf
    • http://hollandfotovideo.com/uploads/1/3/0/8/130873944/bamadaxumatu.pdf
    • http://mail.cattledogcoffeeroasters.com/uploads/1/3/0/8/130814900/d9bd6664d0b7.pdf
    • http://mypersonalalchemist.com/uploads/1/3/0/6/130621973/2375131.pdf
    • http://falcontracedairygoats.com/uploads/1/3/0/3/130324044/pufijunu.pdf
    • http://hostmaster.sandbank-holidays.co.uk/uploads/1/3/0/4/130483804/kogawedonawakag_vepanakikeze_luresov_buzunadot.pdf
    • http://gumpworld.com/uploads/1/3/0/5/130588686/muxalovazetavodeviro.pdf
    • http://catherinerosehull.com/uploads/1/3/0/6/130604498/jelur.pdf
    • http://youngmenofrespect.org/uploads/1/3/0/5/130540567/jimofi.pdf
    • http://bighillcompanies.com/uploads/1/3/0/5/130551164/3454298.pdf
    • http://journeywithjonas.org/uploads/1/3/0/5/130543264/dapelufawug.pdf
    • http://sale-info.website/uploads/1/3/0/2/130270985/84996ae515e.pdf
    • http://goodlifeelixir.com/uploads/1/3/0/9/130969820/3235673.pdf
    • http://08bbf7.com/uploads/1/3/0/2/130270779/1e53cba5f.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_off000077e4.bin
7b7f46f41a8dc026c0b0a3f057074c828c981fb2456ce2d355e7b0274373824a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E4 8412 bytes

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