Malicious PDF — malware analysis report

Static analysis result for SHA-256 678b6315811743a4…

MALICIOUS

PDF

50.5 KB Created: 2020-05-19 06:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c764c56dee8cb7fc7779a9b4b3be6ef SHA-1: f5122ad369950cba7126645864a4099e44ba3552 SHA-256: 678b6315811743a47de6727b0540e1410397a08fbbf6fedc1a5f8e0406197bda
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF document contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs supports this assessment. The document's content appears to be a lure, possibly for SEO manipulation or to direct users to potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pl3photosnouveauregard.ca/uploads/1/3/0/5/130588922/130588922.html#scavenger+hunt%253A+wolf+school+gear
    • http://2enkindle.com/uploads/1/3/0/6/130621165/8259685.pdf
    • http://werunongreen.com/uploads/1/3/1/4/131406560/jatab-xifupolekesoma.pdf
    • http://nznutritionalgoatcompany.com/uploads/1/3/0/6/130639143/pavizuwojupa-rubewaweva-vinusanan-gelezow.pdf
    • http://betapiofiota.org/uploads/1/3/0/3/130323622/bunixodewej_sibozulug_kajunesufu_mapadaxiwepedap.pdf
    • http://ursulamajor.xyz/uploads/1/3/1/0/131070149/4331719.pdf
    • http://aelogisticsservices.com/uploads/1/3/0/7/130776775/luzemod.pdf
    • http://gohomechicken.com/uploads/1/3/0/2/130272282/9454198.pdf
    • http://beeldschermverhuur.nl/uploads/1/3/0/3/130312973/33019febf.pdf
    • http://platinumplusflooringllc.com/uploads/1/3/0/4/130436451/nuxowileza.pdf
    • http://utopiahomeware.com/uploads/1/3/1/3/131380470/lezozazawad.pdf
    • http://sng1product.world/uploads/1/3/1/3/131397971/2239190.pdf
    • http://citizensfirstfinancialgroup.com/uploads/1/3/0/7/130775879/99bc6dd32b3b2.pdf
    • http://pandasalliance.org/uploads/1/3/0/8/130815228/5567282.pdf
    • http://nycellrepairs.com/uploads/1/3/0/2/130287495/zilajokuz.pdf
    • http://savvyledgers.com/uploads/1/3/1/0/131070010/810430b2bb1bac5.pdf
    • http://lionahazeleger.com/uploads/1/3/1/3/131398193/79eece89c97b04b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off000097e4.bin
47bbf80342f8bb61ed24bd6d64e34b2f34cb024aea3900575e3edd6adf15a5ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x97E4 11256 bytes