Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f77e475bcf2284…

MALICIOUS

PDF

57.1 KB Created: 2020-06-06 13:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6c26b871428cf164f30e99dc5b85a0d SHA-1: a07ff6959b381eef1538deadd542399cd1d46b94 SHA-256: 68f77e475bcf228492a70fcdea0cc604127d3f5f729e3b0d7300547eecfb1b74
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which appear to be part of an SEO link farm. One of the embedded URLs, http://mta-sts.mail.savannahmarine.com/uploads/1/3/0/4/130476102/130476102.html#call+of+duty+ghosts+cheats+ps3+youtube, is presented with a title related to video game cheats, likely as a lure. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to manipulate search engine rankings or distribute malicious content.

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://mta-sts.mail.savannahmarine.com/uploads/1/3/0/4/130476102/130476102.html#call+of+duty+ghosts+cheats+ps3+youtube
    • http://rrproductions.shop/uploads/1/3/0/4/130476216/vekaza.pdf
    • http://visitvanessa.com/uploads/1/3/0/2/130287960/redipujataxi-zubaxajawinekiv-wawibajatot-dotarixe.pdf
    • http://pharaohmagnetics.com/uploads/1/3/0/6/130621465/1ed948e627e5be.pdf
    • http://northweststuccostone.com/uploads/1/3/0/7/130776734/97f1f.pdf
    • http://gtprize.com/uploads/1/3/1/8/131857846/paduwonamunu.pdf
    • http://winbtravel.com/uploads/1/3/1/3/131384442/3693028.pdf
    • http://mta-sts.mail.shireoakfilms.org/uploads/1/3/0/2/130287533/6442317.pdf
    • http://kleanoz.com/uploads/1/3/0/3/130323375/bisawoxuto_molorivilatazob.pdf
    • http://carmel-valley-homes-in-palmilla.com/uploads/1/3/1/3/131379692/79f3fb8.pdf
    • http://mxs.restauracemincovna.cz/uploads/1/3/0/7/130775635/1474405.pdf
    • http://hostmaster.mlgdecorating.com/uploads/1/3/0/6/130639071/0ac4a52e.pdf
    • http://thetrinitychoir.com/uploads/1/3/1/4/131438330/5939085.pdf
    • http://mta-sts.mail.savannahmarine.com/uploads/1/3/0/4/130476102/terms.html
    • http://mta-sts.mail.savannahmarine.com/uploads/1/3/0/4/130476102/dmca.html
    • http://mta-sts.mail.savannahmarine.com/uploads/1/3/0/4/130476102/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://qfogojg.sites.looka.com/uploads/1/3/0/6/130604309/peponolo.pdf
    • https://rixazelaxok.files.wordpress.com/2020/06/77224736174.pdf
    • https://fabeneku.files.wordpress.com/2020/06/lopazamuwutepadixesu.pdf
    • https://dizusepi.files.wordpress.com/2020/06/86857145184.pdf
    • https://kuzelelete.files.wordpress.com/2020/06/36696180035.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b500.bin
714c0446bb652600692c1ada18e031787cac3f374a93cd843781c715c217fe48
pdf-font-stream PDF embedded font (sfnt) at offset 0xB500 10352 bytes