Malicious PDF — malware analysis report

Static analysis result for SHA-256 7317de678298dbd8…

MALICIOUS

PDF

46.0 KB Created: 2020-03-15 14:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0b9c6d2868436f0a6bd2fece4589b3d6 SHA-1: e4b639cf815e1cdca7ace6da916a3ffc35bcf529 SHA-256: 7317de678298dbd8ac92c02b4ce7e46360ccd483b4268e90a4f78eb7d0b26189
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external URLs, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links suggests an attempt to direct users to potentially harmful content or further stages of an attack. No scripts were extracted, but the sheer volume of external links is highly suspicious.

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://74-123-75-235.mgwnet.com/uploads/1/3/0/5/130590291/130590291.html#combiner+plusieurs+pdf+en+ligne
    • http://jeanettelukens.com/uploads/1/3/0/5/130589100/vorebikiz.pdf
    • http://objectiveastrology.com/uploads/1/3/0/2/130271090/pesifovekekiv-bojezebixet-valedo-dodonunuti.pdf
    • http://catscupcakes.org/uploads/1/3/0/7/130739052/69ce8bdd.pdf
    • http://ebikevictoria.com/uploads/1/3/0/3/130323329/susujirujuxijuxu.pdf
    • http://pvff.org/uploads/1/3/0/7/130739873/6407238.pdf
    • http://atxscreenrepair.com/uploads/1/3/0/5/130590392/9867833.pdf
    • http://georgiacrook.co.uk/uploads/1/3/0/6/130621754/8583420.pdf
    • http://jingyingqipai.f18.ebkf.org/uploads/1/3/0/4/130477363/497717.pdf
    • http://www.seaheikes.com/uploads/1/3/0/6/130639139/ecb0232ab03.pdf
    • http://atlanticseasaltcompany.com/uploads/1/3/0/6/130604630/069ade.pdf
    • http://thecurvycabaret.com/uploads/1/3/0/6/130604637/gakixekaxokubi_soxowavadaso.pdf
    • http://reallyagoodgirl.site/uploads/1/3/0/6/130621130/tusisapo_jefilixewore_zefudoruz_rekenosepi.pdf
    • http://clarkpublications.com/uploads/1/3/0/6/130621015/cf4120ec71c7a.pdf
    • http://landmdrivingschool.com/uploads/1/3/0/7/130740195/dinidok-fofawewifuwu-terez.pdf
    • http://mail.professionalimagesf.com/uploads/1/3/0/5/130546885/sawosu-kijuzawu.pdf
    • http://summerhill-homes.com/uploads/1/3/0/5/130547552/puxurozamivez-mupufoliseginat-xekatar-gasozewukumik.pdf
    • http://shactiro.com/uploads/1/3/0/5/130539340/vadamiso-vekamo.pdf
    • http://bloomsnbouquets.com/uploads/1/3/0/5/130590658/9528708.pdf
    • http://kiddegroupllc.com/uploads/1/3/0/6/130605065/d7153a9.pdf
    • http://autocockerpartsblog.com/uploads/1/3/0/3/130323302/6746104.pdf
    • http://www.spapelle.net/uploads/1/3/0/2/130273762/6411027.pdf
    • http://afswaialua.com/uploads/1/3/0/6/130621525/bevuzenokewonikeri.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_off00008808.bin
2a0f4671e365b4a1bdc51152a1e4319144db4505e28952714a63842b78de6b15
pdf-font-stream PDF embedded font (sfnt) at offset 0x8808 9412 bytes