Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6ca53e2bcfc0a3…

MALICIOUS

PDF

45.9 KB Created: 2020-10-04 00:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 38e3260a238532da72017ce70e7f6aa0 SHA-1: e8891690247016271d6fbb9a154ca0aa6c407d7c SHA-256: 2a6ca53e2bcfc0a38a33e06a457cced6e633970dd44e818a8fb1939d19484b23
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://cctraff.ru/strik?keyword=angela+davis+women+race+and+class In PDF document text
    • http://nevobib.accessoryworkshop.com/uploads/1/3/1/4/131482993/9423039.pdfIn PDF document text
    • http://files.mountainlightmusicfestival.com/uploads/1/3/1/4/131438058/tipapol.pdfIn PDF document text
    • http://files.dscampers.co.uk/uploads/1/3/1/4/131438111/9647471.pdfIn PDF document text
    • http://files.chathamhighlandsna.com/uploads/1/3/1/6/131606056/d93081b5.pdfIn PDF document text
    • http://watazox.mybeauteousboutique.com/uploads/1/3/1/4/131411341/pulajukugumasosowab.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/1/0478/4390/1599/files/kidugolazezawuror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/hand_basketball_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1630/4278/files/follow_treasure_map_signpost_junk_junction_forbes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9963/6390/files/33505600679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a530ec-99c3-46d9-aef5-374cc876691d/vatijuzabiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b61bf90-9102-41b5-99a9-9e0c5b1a651c/wefojaleg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31b46f2-5d27-4406-8226-1efb23303dbc/42406811412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/9907/7016/files/xasotutomisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/88397159895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/dragon_ball_gt_manga_resuming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/98172907258.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_off000074a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A7 5400 bytes
SHA-256: 15dce8ef1e2aa3c99587af656d6d216cf607dc96c5ef72840763d4d8929e249e
font_01_sfnt_off00008705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8705 10380 bytes
SHA-256: bd2929276910e3531e70b516a835ef1759860680cf220fc7c7b0ec2e8721a61a

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