Malicious PDF — malware analysis report

Static analysis result for SHA-256 565bb630fdc8d697…

MALICIOUS

PDF

44.5 KB Created: 2020-03-09 03:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2e765478fec9296f7531604f2430a2d9 SHA-1: 1286cee5de48f3cc6ee59708779a50d39327c7ef SHA-256: 565bb630fdc8d697e2044aa09acffabc5ed6c909cdf627b79d107bba1a49a922
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF documents hosted on different domains. This suggests a link farm or distribution mechanism for potentially malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

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://maverickworldtravel.voyagerwebsites.com/uploads/1/3/0/7/130739755/130739755.html#primary+adrenal+insufficiency+symptoms+skin
    • http://amberjavancecounseling.com/uploads/1/3/0/2/130288523/1095242.pdf
    • http://antelopevistacarehome.com/uploads/1/3/0/7/130775859/8381974.pdf
    • http://spjpittsburgh.com/uploads/1/3/0/6/130605280/vigiri.pdf
    • http://millerfamilylawn.com/uploads/1/3/0/7/130776077/3829184.pdf
    • http://paulshone.info/uploads/1/3/0/6/130605275/7432601.pdf
    • http://lisamsinger.com/uploads/1/3/0/6/130621240/baduk.pdf
    • http://dgmobilehorseboxrepair.co.uk/uploads/1/3/0/7/130739696/mejovomupolujezar.pdf
    • http://3lmboutique.com/uploads/1/3/0/2/130288562/3334932.pdf
    • http://www.praticallyhealthy.com/uploads/1/3/0/5/130550813/nezizinesuzuniz.pdf
    • http://cityonemaroochydore.com.au/uploads/1/3/0/5/130543141/6922783.pdf
    • http://phoenixneighborsknowbest.org/uploads/1/3/0/6/130621682/8428552.pdf
    • http://ardentartistmanagement.com/uploads/1/3/0/9/130969819/povulipamibik_goxakukunalub_gimazez_peleresafa.pdf
    • http://www.mkaganassociates.com/uploads/1/3/0/9/130969076/c0cfe1.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_off0000866d.bin
a2b65769d01b34b82c03a95526012375f715655e5dd49d4ba53f5fbb8482e0f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x866D 7820 bytes

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