Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8dafd6adde23fe…

MALICIOUS

PDF

31.6 KB Created: 2020-06-10 02:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e6e859dcd2671d54322a69023bb5416 SHA-1: 7b78d014a94df1a0c05ed23ad3d41fd438ffdc0f SHA-256: cb8dafd6adde23fe55535d5757b718b024a9f8dfe019bcc86ec16de39a8fddd1
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF SEO link farm. The primary external URI points to 'http://everysecondmotivation.com/uploads/1/3/0/9/130969596/130969596.html#%25C3%25B6l%25C3%25BCm+yar%25C4%25B1%25C5%259F%25C4%25B1+5+t%25C3%25BCrk%25C3%25A7e+dublaj+izle', suggesting a lure to external content. The ML classifier strongly indicated maliciousness, supporting the link farm heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://everysecondmotivation.com/uploads/1/3/0/9/130969596/130969596.html#%25C3%25B6l%25C3%25BCm+yar%25C4%25B1%25C5%259F%25C4%25B1+5+t%25C3%25BCrk%25C3%25A7e+dublaj+izle
    • http://thebestrateinsurance.com/uploads/1/3/0/2/130288580/1401868.pdf
    • http://yoursolopreneur.org/uploads/1/3/0/7/130775722/pirule.pdf
    • http://easymile101.com/uploads/1/3/0/7/130739082/1575714.pdf
    • http://emmaelliottraditional.com/uploads/1/3/0/7/130738970/cedec.pdf
    • http://medicalaccesstutoring.net/uploads/1/3/1/4/131483109/3382956.pdf
    • http://lonersnomadsmc.ca/uploads/1/3/0/4/130435929/3721cd.pdf
    • http://scoreboardgrillecom.com/uploads/1/3/0/7/130776319/neren.pdf
    • http://not-wasted.com/uploads/1/3/1/3/131379990/dexer-pufuzenitubaxi-winefafupup.pdf
    • https://dedovirap.files.wordpress.com/2020/06/gepumizaguno.pdf
    • https://boduwifa.files.wordpress.com/2020/06/70049733235.pdf
    • https://kujinanixujo.files.wordpress.com/2020/06/45049960433.pdf
    • https://ratuwig.files.wordpress.com/2020/06/zilavufixajanaf.pdf
    • https://lipeliwopega.files.wordpress.com/2020/06/12610448544.pdf
    • https://dunawudawoma.files.wordpress.com/2020/06/12521568158.pdf
    • https://raneguwuvaxa199338652.files.wordpress.com/2020/06/belazisogosabizawezijonik.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_off00004e57.bin
d90eb03d2807af9ea9b64a8c95d7c1e97e78f217a085223c86bc256e655c4768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E57 11024 bytes

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