Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d3460c4d941c86…

MALICIOUS

PDF

39.3 KB Created: 2020-10-07 06:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 559fea1a3a4c429efb04a10a90fd5abd SHA-1: 77b3d8efe82c1eac3f5cbe416f540616a1b66bde SHA-256: 01d3460c4d941c86bf91d1e95c86a435a475946c6aa6d88dd0c234efa240e8c4
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 https://ggtraff.ru/strik?keyword=kuran%25C4%25B1+kerim+tefsiri+indir In PDF document text
    • http://files.dogwooddoodlebugs.com/uploads/1/3/1/3/131381464/tokugevopepod-dexubikirawiw-pinas.pdfIn PDF document text
    • http://files.owensoundmassage.com/uploads/1/3/2/7/132740270/15ceb522.pdfIn PDF document text
    • http://vegefefex.simplybirthclasses.com/uploads/1/3/0/7/130776406/gozinidomuliji-kuvufedakenafa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/alpha_epsilon_lambda_jackson_state_university.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0320/9622/files/70502904896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9139/2664/files/lr1130_battery_equivalent_to_357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e15f8c1-c696-476c-b809-f6e44ab4d4bc/24738778664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed53de68-71eb-4f34-8859-c1aa0efcc38a/61429136679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a21af21-f40c-406e-abf6-81d8f4ee0fe7/69318730424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0860b65c-7953-4aae-88f0-7ba76365608e/nujofegadudoni.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D8E 4860 bytes
SHA-256: 2e2d05c37694a5c94f07e0a47e4a63330dc551a2f6392e7a06b1f5f8547048c3
font_01_sfnt_off00005def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEF 11356 bytes
SHA-256: 423764ad953f4a6115ac615cf266830699b8f3e6f387ea01f7717c6a9f5eeb80
font_02_sfnt_off000080e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34