Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8218bf18fe5b1a2…

MALICIOUS

PDF

57.6 KB Created: 2020-05-26 01:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cddf524de72c7eaf025380044352af4f SHA-1: 7bccc1953c1626b773b2b283b33b7da46a693c1f SHA-256: c8218bf18fe5b1a24f2c212c920f63cd634af3ae8d21a90a041c72d8df027aac
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm designed to manipulate search engine rankings or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text and embedded URLs, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://3rr.undesirable.us/uploads/1/3/0/3/130324227/130324227.html#damon+ps2+free+bios
    • http://innosphere.be/uploads/1/3/0/7/130738823/8097159.pdf
    • http://yonatan-demo.octarinesec.com/uploads/1/3/0/5/130544086/3690514.pdf
    • http://lechantecler.com/uploads/1/3/1/4/131453100/siralukano-fasudubu-sujefudijokim-wozarefagumev.pdf
    • http://mehrconstruction.com/uploads/1/3/0/6/130620557/jifixasekunor.pdf
    • http://michaelandmichelangelo.com/uploads/1/3/0/5/130547527/30bd402a021fd.pdf
    • http://jessiejewelryarts.com/uploads/1/3/0/3/130313400/9710466.pdf
    • http://owensburgauto.com/uploads/1/3/0/2/130270753/77cc9c.pdf
    • http://mx.twochicksandabar.com/uploads/1/3/0/5/130588239/0e9a77b53f.pdf
    • http://adam-butler.net/uploads/1/3/0/7/130776408/87e63171a2.pdf
    • http://miranda-bewindvoering.nl/uploads/1/3/1/6/131636852/ee40d2860bcb177.pdf
    • http://degalvezclothing.com/uploads/1/3/0/7/130775694/7b28988e.pdf
    • http://provokindness.org/uploads/1/3/1/3/131379824/5334695.pdf
    • http://n0wplaying.com/uploads/1/3/1/8/131856627/zevuruwipijeme-kekusuzesafixi.pdf
    • http://teambuildingingeorgia.com/uploads/1/3/0/5/130589004/63b37dce.pdf
    • http://kccredentialing.com/uploads/1/3/1/3/131398517/tegesadizu-bidiwe-kamem-nawew.pdf
    • http://coralharbourmarinaresort.com/uploads/1/3/1/8/131856549/sevuzuk.pdf
    • http://nattanan-t.com/uploads/1/3/0/9/130969878/kojude_tozolazi_gilid_tomizapezavufeb.pdf
    • http://jrassociates.org/uploads/1/3/1/4/131406945/4c4706ebe6a.pdf
    • http://mta-sts.mail.seinswerk.ch/uploads/1/3/0/6/130639588/0176bd.pdf
    • http://mcgrawpowersystems.com/uploads/1/3/1/6/131606569/09d44159.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000a5c8.bin
47e6be46b327c7564a92a726f982cbd2595d85c8255554d7d649b95fb09c9818		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA5C8 30280 bytes
font_00_sfnt_off00008120.bin
6986eab121b96a5b826a93d89e33a717e16668d8a805b9b804ad5fb49ee60a15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8120 10608 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.