Malicious PDF — malware analysis report

Static analysis result for SHA-256 127db48a67f22b73…

MALICIOUS

PDF

49.3 KB Created: 2020-03-20 14:54:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2f2afead6fe80efb73cac04c319fd409 SHA-1: c8175ee0f1057d6cfd003424b9932e3d1aef47ac SHA-256: 127db48a67f22b73c4db3d2ab4fd1006b042b8d8191a6e2bf5031b46fba3b920
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO spam campaign. The document body, though partially corrupted, contains text related to journalistic commentary and includes URLs that likely lead to malicious content or further redirection. The ML classifier strongly indicated maliciousness, and the PDF structure with numerous external links is a common tactic for distributing malware or driving traffic to malicious sites.

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://insureapplewatch.com/uploads/1/3/0/9/130969354/130969354.html#funciones+del+lenguaje+comentario+de+texto+periodistico
    • http://africanblackant.net/uploads/1/3/0/3/130379921/4f9e0d0a6c8c6e.pdf
    • http://56-courage2020.com/uploads/1/3/0/3/130324136/8b9e09bba.pdf
    • http://www.auxsaveursdantan.com/uploads/1/3/0/6/130639747/4042261.pdf
    • http://mta-sts.denvertechexecutiverents.com/uploads/1/3/0/5/130588289/6192824.pdf
    • http://www.kkmealprep.com/uploads/1/3/0/4/130488195/7275075.pdf
    • http://mta-sts.mx.cigarclubmodesto.com/uploads/1/3/0/9/130969277/ponosogegupazuzeb.pdf
    • http://privacydoctrine.net/uploads/1/3/0/5/130542829/gefaxav.pdf
    • http://atlasdragons.com/uploads/1/3/0/7/130776728/verumew.pdf
    • http://andrenathletics.com/uploads/1/3/0/6/130603769/tujiditasemet-lirowe-nenadakozig-pulominabax.pdf
    • http://www.fuszionmusic.com/uploads/1/3/0/8/130874482/fuzeginupudamik.pdf
    • http://dbfglobalenterprises.com/uploads/1/3/0/4/130488213/9586559.pdf
    • http://wecancater.com/uploads/1/3/0/8/130813496/052960f71ed0.pdf
    • http://stjeromewestchester.org/uploads/1/3/0/6/130621545/737d5a4ce5.pdf
    • http://www.jerseyshorefreeride.com/uploads/1/3/0/6/130620902/lolev.pdf
    • http://earthalchemyarts.com/uploads/1/3/0/7/130775685/342c64cb6b5.pdf
    • http://patleeart.com/uploads/1/3/0/6/130604769/dewutulolosedemaratu.pdf
    • http://aabuildingmaintenance.com/uploads/1/3/0/7/130740556/97b8a.pdf
    • http://mspennylane.com/uploads/1/3/0/6/130621059/fagedojoru_weteremitivenop.pdf
    • http://www.wellwishescbd.net/uploads/1/3/0/5/130588931/fbc005b.pdf
    • http://carmichaelfashions.com/uploads/1/3/0/6/130605339/cdc8077.pdf
    • http://mail.mayflowerofbillings.com/uploads/1/3/0/9/130969149/a688368a22ea20.pdf
    • http://littlepennyblog.net/uploads/1/3/0/8/130814197/3280732.pdf
    • http://hgmreferralsources.com/uploads/1/3/0/6/130622084/podev_kulatodobovib.pdf
    • http://www.cookingwithnoodles.com/uploads/1/3/0/8/130873838/206512.pdf
    • http://multitechroma.com/uploads/1/3/0/7/130739459/futum-nugej-gakov-wutilivew.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_off000094d6.bin
6f71b9f99f6828ce249ec11d57f8364c5943926d95fd2c88352ad2d4eadbfcb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94D6 9052 bytes

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