Malicious PDF — malware analysis report

Static analysis result for SHA-256 957429628e242d4e…

MALICIOUS

PDF

46.6 KB Created: 2020-11-05 17:51:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4a1e9777907881afeeeab6078d412457 SHA-1: a1c343e0f4e5bb15bb4953b8bf51950acd428f01 SHA-256: 957429628e242d4e4861ac38a6fa4267fcc7c80732edcff4f97f5a4e69456c04
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://traffine.ru/strik?keyword=happy+new+year+2019+pictures+farm In PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • https://kegegofelev.weebly.com/uploads/1/3/2/6/132681159/a92d7ab06b8.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/bogirisekede_mexelasutezovi.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://s3.amazonaws.com/susopuzupure/welozetopelovabupurunox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b807ff8d-6261-4405-94ea-88ed97722f4e/patrice_pavis_dicionrio_de_teatro_p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa444765-65cc-4767-9783-2b3491d86b36/le_loup_est_revenu_tapuscrit.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/51489840631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d67eb4-aab7-4e74-9cf6-1e9046d65912/singer_tradition_2277_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2715d6a8-f346-46a1-98b1-eefffe792fca/vox_nicholson_baker_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/mogelebolep/bobesuzapopolazomesafule.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/envision_math_5th_grade_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/kaban_s_protocol_for_tmj_ankylosis.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/fake_call_and_sms_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/facebook_apk_download_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/11073298364.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_off00006a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A61 5536 bytes
SHA-256: 89651d190e8d5ecd18a4524ba96bdfb587398ae223040580818a22a97f77f8c9
font_01_sfnt_off00007d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D31 10092 bytes
SHA-256: 693c5324de0700b43dc7f2f724da0762e3ea6a7cfe3d9b74ddf5887e2eda5b86
font_02_sfnt_off00009f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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