Malicious PDF — malware analysis report

Static analysis result for SHA-256 268df8f089dd6417…

MALICIOUS

PDF

44.6 KB Created: 2020-04-11 10:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 16e62b9410b949e30ccb849e34119603 SHA-1: 63a7c6f3e46b17adeaa7d2c47914f7050cc7bfec SHA-256: 268df8f089dd641727f8f0644cc1d1f27e44a697d08e4f00e1804a578900ab96
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains text related to 'August doorbell camera reviews' and references wkhtmltopdf, indicating a potential lure. The presence of numerous external URIs and the ML classifier's high confidence score strongly suggest malicious intent, likely to redirect users to compromised or malicious 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://lennoxweb.com/uploads/1/3/0/7/130740387/130740387.html#august+doorbell+camera+reviews
    • http://neonopen.com/uploads/1/3/0/8/130814579/mutetog.pdf
    • http://andrewgouldmusic.com/uploads/1/3/1/4/131409310/fazemawejofil-bigagege-finezuretij-dumad.pdf
    • http://miamihomes.xyz/uploads/1/3/1/4/131437766/nalabiduso.pdf
    • http://actiontanning.com/uploads/1/3/1/3/131384306/winunaxolixaxejinuvo.pdf
    • http://transfertocollege.org/uploads/1/3/0/4/130436162/zofakegenama.pdf
    • http://amilcarchavarria.com/uploads/1/3/1/4/131438293/3543177.pdf
    • http://ski-103.com/uploads/1/3/1/0/131070733/755fba0e3.pdf
    • http://hessenergyllc.com/uploads/1/3/0/6/130620924/tovotojezin-tinudabubej.pdf
    • http://leaderkast.com/uploads/1/3/0/5/130551536/19b8ce3fbcef1.pdf
    • http://farsideofoz.com/uploads/1/3/0/5/130546209/1531409.pdf
    • http://ecconsultationllc.com/uploads/1/3/0/5/130588173/8364087.pdf
    • http://mrsheridanenglish.com/uploads/1/3/0/4/130483805/3951139.pdf
    • http://theabsolutetire.com/uploads/1/3/1/3/131380109/d914eaf90fc22.pdf
    • http://stevehetrick.com/uploads/1/3/0/5/130540592/tofaxatumalo.pdf
    • http://mycokosmos.org/uploads/1/3/0/5/130588266/mobigejapuse-wewavozodaj-kedare-regugovanumuri.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_off0000869d.bin
3449b3cb8b42e17f4cb6d71a9ae8c30a133aea68cdce82bc8b3f4811477eb627		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869D 7716 bytes

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