Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb962d49cc1e092…

MALICIOUS

PDF

36.2 KB Created: 2020-10-03 07:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fc15def0633a4062859dd2a17f4b2942 SHA-1: b937ecb823e4aed5aa7b1e1ad73858f179984d9f SHA-256: bdb962d49cc1e09273a5f6fe6443b7b9eb408d2d6743027a25b44efebe846a5d
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=modern+elementary+statistics+freund+pdf+download In PDF document text
    • http://remubumo.fietstaxischeveningen.nl/uploads/1/3/0/7/130738902/zesik_gokodomipadam_jilubapib.pdfIn PDF document text
    • http://koriwudi.abellcable.com/uploads/1/3/2/8/132815806/4180883.pdfIn PDF document text
    • http://wogif.zoomsauces.com/uploads/1/3/1/6/131637409/ab6802d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6580/2903/files/gokakogidoxipezasexaleb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5507/9320/files/igun_pro_hack_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8074/5629/files/closest_manual_car_wash_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2788/9303/files/47837985961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7801/7443/files/40104351304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5488/5785/files/73017063248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5261/5830/files/pc_doctor_module_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b7711a-89b1-427e-b357-0797233657e5/98558877041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19e1a0ca-872d-4126-965c-f28b9d8a4377/34830760514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9edf8ca-260e-4a50-ac7c-2b394e89bcbb/93569695944.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_off00004dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC6 5500 bytes
SHA-256: d2b945a5073b6ad98818fb61c60fdd9f9569ba5a80b70efabfcebfb062067220
font_01_sfnt_off0000608a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608A 10368 bytes
SHA-256: ed853c16b5ba1de40756c096b04174b318f84d9a2c9d3042852feb720805ec52

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