Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d792babf6ab6ac…

MALICIOUS

PDF

46.5 KB Created: 2020-04-02 12:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 28d31b1a7f8f20054ea3c742921ca59d SHA-1: 6a4a5285f2fa6b527bd810dddf1faf0d6a8c637b SHA-256: d2d792babf6ab6acbfbafa63bda9b43a26871056665657e3e1679d292ab4989e
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, many of which appear to be SEO-optimized and numerically or generically named. This pattern is indicative of a link farm or a mechanism to drive traffic to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://iammisserickaj.com/uploads/1/3/1/4/131407386/131407386.html#que+es+un+relato+historico+y+ejemplos
    • http://savannahusedtruckparts.com/uploads/1/3/0/7/130776331/larinor_xorenilonuturox_jifazidovo_sewetojeninoji.pdf
    • http://sialiacademy.org/uploads/1/3/0/4/130490451/41b9b0d8.pdf
    • http://infiniteequinesolutions.com/uploads/1/3/0/7/130775730/mibixaxuvuxodepukow.pdf
    • http://misszoilaj.com/uploads/1/3/0/2/130274241/731759.pdf
    • http://mikemota.com/uploads/1/3/0/2/130272977/palujopezemo.pdf
    • http://worthyofyourtime.com/uploads/1/3/0/4/130476370/c1ad04.pdf
    • http://boyceneilcarter.com/uploads/1/3/1/1/131164176/walezopa-fumor-zazisakesitewa-xovofewojam.pdf
    • http://phonecases-n-cords.com/uploads/1/3/0/7/130775949/forubug_burasemen_jipixerix.pdf
    • http://kokasi.org/uploads/1/3/0/2/130273982/5849c915ae072.pdf
    • http://yeahpod.com/uploads/1/3/0/6/130620537/gogobonewobor.pdf
    • http://jasonchanseoyu.com/uploads/1/3/0/5/130540037/7fe8591922a9.pdf
    • http://knbranchfl.com/uploads/1/3/0/4/130483739/c7936482542f87a.pdf
    • http://powerdriveroofrestoration.com/uploads/1/3/0/5/130543064/tuxikoxa-rizadema-bezaduv-wukelaji.pdf
    • http://kimwhitmorewritesromance.com/uploads/1/3/0/2/130274151/butatix.pdf
    • http://www.bodyinthewindowseat.com/uploads/1/3/0/2/130270941/girito.pdf
    • http://kaylabina.com/uploads/1/3/0/7/130776673/2465164.pdf
    • http://thepinkreef.com/uploads/1/3/0/5/130590122/8133506.pdf
    • http://pipsqueakacademy.com/uploads/1/3/0/7/130738798/db4082.pdf
    • http://morethansoulfood.com/uploads/1/3/0/7/130740591/8528561.pdf
    • http://sunriseonlinecourses.com/uploads/1/3/0/7/130775186/92c40a23cc9c.pdf
    • http://lunaspropaintingllc.com/uploads/1/3/0/7/130740082/gekoxenudupa.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_off0000896d.bin
ade3c871cd09e14133f11376a38afe844442f2739e42de80d32b7b5ed7bcf516
pdf-font-stream PDF embedded font (sfnt) at offset 0x896D 9256 bytes