Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12bc8f542948e86…

MALICIOUS

PDF

58.5 KB Created: 2020-10-16 20:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e6a81eb60cb83df5a50db81112e910ef SHA-1: 590cb67c7e09098cb98a537d93cbc25cc1be5e9d SHA-256: c12bc8f542948e86043c0b1dca14f5d331a9d41faa5b4cbb8304c484311542f8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by an ML classifier and contains a significant number of embedded links. One of these links points to a known malicious redirector, suggesting a phishing or spam campaign. The document body, though heavily obfuscated, contains the malicious URL, indicating an attempt to lure users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=skyrim+simple+slavery+auction In PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/4606116.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/livefoze.pdfIn PDF document text
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/6782f6.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3808383.pdfIn PDF document text
    • https://ziperivowupidu.weebly.com/uploads/1/3/1/3/131381589/temijege_korexodix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f89cf9876aa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_5f8935e33a133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f87c2e1c65e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f89066052223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f879a2ecf18c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb84d8ed-09d5-4a0d-a2d5-ca77643c1e1a/23940300514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d53e14-eb77-4d26-8809-ef6b93251c95/84831851802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8032fb57-1636-42f5-b50d-cdc6b0ea05a8/gowev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a95a0788-8020-4be4-a6c4-4df1b2570123/xitekadakawovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213469a7-ffa1-463c-a499-05b7b1521e51/pofudepunurewevafago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/045b0237-7d08-41f0-999d-5d832ec45abf/xepidaxurefetudipujixola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f2225a-8571-446c-9e32-63905bac1d28/32216740567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf897582-b601-43c2-892c-77e58d7d2b7b/batavogejexexog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0635352-ad71-4b31-a089-9b2f63c94698/dorizidilisam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3686c867-b484-430f-bda3-29a4b62f0c80/49902490904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8ffc83-e770-4240-9b21-d1dd35f52af7/33777736503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3833/8972/files/36900138708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3416/2853/files/itv_player_app_for_android_box.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4891/8936/files/the_road_to_power.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8346/4855/files/predator_motorcycle_helmet_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2386/8319/files/39091156640.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA549 5408 bytes
SHA-256: fd86eb1efaec8df7940165a158e2cd8139cf34f2d0ee80cae1c60a08480bbc37
font_01_sfnt_off0000b79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB79E 10796 bytes
SHA-256: 3f17f50d08266f55676757afd342b3df5b66f2e37a83f0fa4a31234b59a4f9f9

Open this report in the interactive analyzer, or submit your own file for analysis.