Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ac417142841f5e…

MALICIOUS

PDF

32.8 KB Created: 2020-04-04 06:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5913746e22663fd48dc26e08d564efd9 SHA-1: f107ce5c273340ba862a4e081cc6d443ba9de01b SHA-256: 44ac417142841f5eddeeccd49fff86e8a170b4fd8689152a08563986c6afb9e6
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO poisoning to drive traffic to malicious sites. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior. The embedded document body text, though heavily obfuscated, contains URLs that are also listed in the extracted URLs, reinforcing the link-farming attack pattern. No scripts were extracted from this sample.

Heuristics 3

  • 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
  • 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://dexteritycorp.com/uploads/1/3/0/4/130435701/130435701.html#broadcom+802.11+abgn+wireless+sdio+a
    • http://kaitsaforauditor.com/uploads/1/3/0/9/130969506/bipunilisipiju-padozapipip-wedesowedesuzap-ribulavulujixe.pdf
    • http://holdmeclose2019.com/uploads/1/3/0/2/130289386/b7a933897c663a.pdf
    • http://richardbollo.com/uploads/1/3/0/2/130273625/wesinajowe_visesitewasup_durikodaw.pdf
    • http://laurayurko.com/uploads/1/3/0/7/130776229/lowejafima.pdf
    • http://bhclab.org/uploads/1/3/0/2/130289448/888038.pdf
    • http://liquid-vitamins.com/uploads/1/3/1/3/131380225/gikigib.pdf
    • http://disneyismylife.com/uploads/1/3/1/3/131398404/lajotakebema.pdf
    • http://islandgrillexpress.com/uploads/1/3/1/4/131454143/3501280.pdf
    • http://drlesterleemd.com/uploads/1/3/1/0/131069838/vezinobefosi.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_off00005700.bin
bfa4bcd8420f38438921db577bb9653f8cf2b92ee545017b5e65b335a4198f48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5700 7600 bytes

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