Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1138007df97dbb…

MALICIOUS

PDF

35.2 KB Created: 2020-06-06 00:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 175cd028a2118f6cb0a07c5521720f7f SHA-1: 81e3375b6e9925e13117a043fbb206723bdaa493 SHA-256: cd1138007df97dbb25c147b71710eed5378b168b4ac22324ea2474e2b8539406
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, many of which point to other PDFs hosted on similar domains. This pattern is indicative of a link farm designed to manipulate search engine results or to host malicious content. The primary URL, http://encore00037.voyagerwebsites.com/uploads/1/3/1/3/131381151/131381151.html#overhead+door+4040l+program+remote, is likely the intended destination for the user. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://encore00037.voyagerwebsites.com/uploads/1/3/1/3/131381151/131381151.html#overhead+door+4040l+program+remote
    • http://thebdpgroup.com/uploads/1/3/1/3/131379700/7ac6845205da.pdf
    • http://cpanel.artofgg.com/uploads/1/3/1/4/131452886/853456.pdf
    • http://journeymappers.rocks/uploads/1/3/0/2/130289427/ea68ca93a14d.pdf
    • http://3cr.undesirable.us/uploads/1/3/0/6/130603946/jopixoxikutiz.pdf
    • http://alluringoccasionsbybianca.com/uploads/1/3/0/7/130776103/9884802.pdf
    • http://mta-sts.mx.sinkourship.org/uploads/1/3/0/7/130776791/sawono.pdf
    • http://greyhoundsafetynet.net/uploads/1/3/0/7/130775567/kujakodirej.pdf
    • http://amyheidt.com/uploads/1/3/0/9/130969329/53d44ec.pdf
    • http://maynframetechnology.com/uploads/1/3/0/5/130543262/xafitunevujijifoz.pdf
    • http://perricootavines.com.au/uploads/1/3/1/6/131637482/mapijutenavet.pdf
    • http://techforgood.biz/uploads/1/3/1/0/131070488/1995265.pdf
    • http://climentartstudio.com/uploads/1/3/0/2/130270834/4532012.pdf
    • http://encore00037.voyagerwebsites.com/uploads/1/3/1/3/131381151/terms.html
    • http://encore00037.voyagerwebsites.com/uploads/1/3/1/3/131381151/dmca.html
    • http://encore00037.voyagerwebsites.com/uploads/1/3/1/3/131381151/policy.html
    • https://lesijasofu.files.wordpress.com/2020/06/bakinaxu.pdf
    • https://rezodubesike.files.wordpress.com/2020/06/86946343443.pdf
    • https://wedofosuluf.files.wordpress.com/2020/06/difadetakuritapinifijabu.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_off00005eac.bin
97fb86325584193361f58ac24c7879ec6735f2d5378fbcd7d251b1265c2b9ca4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAC 10280 bytes