Malicious PDF — malware analysis report

Static analysis result for SHA-256 502529c3a795ed54…

MALICIOUS

PDF

46.3 KB Created: 2020-10-02 06:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: be29dfaa68635bc23fb0309abb72f6d8 SHA-1: 9b03eb6908d684f7176ca9d5e5d84800a16bbc1c SHA-256: 502529c3a795ed54b44d4a3a42fe2c4e6ea65c2f50545a796452640507142244
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=dipleurula+concept+of+origin+of+chordates+pdf In PDF document text
    • http://fasurebi.silkroadrebellion.com/uploads/1/3/2/6/132682924/4a14f13b0.pdfIn PDF document text
    • http://patesuj.fcaky.com/uploads/1/3/1/3/131380601/ratelazotorujog.pdfIn PDF document text
    • http://files.pass-the-idea.com/uploads/1/3/1/3/131398274/dazukujuferomo.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/1/0482/6238/1729/files/77969543310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/9440/9884/files/how_to_file_a_missing_persons_report_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0364/9953/files/wizard101_life_spell_tier_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/3946/2054/files/how_do_you_make_bright_red_eyeshadow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/3_8_in_decimal_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/mukuzobulazawuvore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/mugalodadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1251/7798/files/sumazorux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1896/4122/files/haxion_brood_tactical_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5003/2549/files/85363036953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d88e3f9-38e4-46c9-adee-00fd0acde07c/foror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad2e29d5-4a47-4f33-b17e-61b87527a0fc/86978103978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d48893-b16f-4967-905b-5f30037e0c60/lisivevudoxojebisekob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c895c77-3038-4643-a0a4-de7b1dc38dc9/26892527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c1bbfa-02cd-491d-96f4-742fcc43a514/73480188835.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_off000076e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E6 5416 bytes
SHA-256: a61df70f2773d4b99b3e0931acfb73a1cc850229613204f51b73358a1df02679
font_01_sfnt_off0000894e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x894E 10144 bytes
SHA-256: c0ef21832ccb0e6603a3a61ac7512f449dd56f6d60b401975741207a03a6d45e

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