Malicious PDF — malware analysis report

Static analysis result for SHA-256 00170082e57ee7e2…

MALICIOUS

PDF

43.6 KB Created: 2020-04-08 15:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 58d0b98ca2d5724ed4d51dde01a7b365 SHA-1: 970c876a3940e955cb2f18d3ba6cf509db4d5620 SHA-256: 00170082e57ee7e2699439f87d6f4df7028749a15abaec2e06c2619bee82754c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious PDF

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, contains a URL that matches one of the extracted external links. This suggests the primary purpose is to redirect users to a network of linked pages, likely for malicious SEO or to distribute further payloads.

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://cequime.com/uploads/1/3/0/2/130289242/130289242.html#que+es+la+investigacion+cualitativa+y+cuantitativa+pdf
    • http://floorexpertslimited.co.uk/uploads/1/3/0/6/130604177/zudalo_lodigara.pdf
    • http://nordicriviera.com/uploads/1/3/0/5/130550752/ranaparuzapo-vapava.pdf
    • http://webmail.fredcarmichaelsafety.com/uploads/1/3/0/2/130288661/jowefexebakis_buvupexiru_gojosovenu_miwipukadawevox.pdf
    • http://rsiqueira.com/uploads/1/3/1/3/131398424/tupala-komitewizor-dipogititep-xagogev.pdf
    • http://ltdistributing.org/uploads/1/3/0/3/130323187/pidakuloxaw.pdf
    • http://muskokawaterfrontcottages.ca/uploads/1/3/0/6/130620685/girojodapegigeku.pdf
    • http://thesweetshopbakery.com/uploads/1/3/0/7/130739006/84906479f.pdf
    • http://unitedglobaltravel.net/uploads/1/3/1/4/131483254/mijegevezodopo.pdf
    • http://greaterworkscic.org/uploads/1/3/0/6/130604209/wonemutajaduz.pdf
    • http://ltofficeequipment.com/uploads/1/3/0/4/130435777/nigorat-paxarosofugofu.pdf
    • http://kidsasmentors.com/uploads/1/3/0/6/130639175/kizizimusen-tarobo-gifirivipose.pdf
    • http://caninerehabpartners.com/uploads/1/3/0/7/130776402/narufidugabu.pdf
    • http://piratevip.com/uploads/1/3/1/4/131407414/63c9b329e7f37.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_off00007eb6.bin
c0ed24cf5e620db74f2d0f2534f93d38d23abe356f4f58ef97bb1e346b0c02d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB6 8924 bytes

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