Malicious PDF — malware analysis report

Static analysis result for SHA-256 110c037417ad0693…

MALICIOUS

PDF

42.5 KB Created: 2020-10-09 17:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 55b473c927a828c04e23dca9b5d35672 SHA-1: dafe51ee47e368bc6f716cf985d16b2c0838e08b SHA-256: 110c037417ad06933bd782aba8bac3ec54679f4ccb9091248bac18360fe3185d
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=dark+knight+training+guide+maplestory In PDF document text
    • http://files.legrandtriage.com/uploads/1/3/2/6/132682030/2e6a2a03045.pdfIn PDF document text
    • http://files.discoverdp.info/uploads/1/3/2/6/132682124/lesalu.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/1/0486/5533/5574/files/53596171132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3206/3383/files/minecraft_classic_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5587/6769/files/simple_past_exercises_multiple_choice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9473/7045/files/58292409302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4913/8846/files/le_sacre_du_printemps_part_ii_sacrificial_dance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dcae040-a7f7-4cdb-9742-0c7989797d4b/luwog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/339fe321-3985-453c-b3c3-bdfd0f2931fe/75398272449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab35dbc-bcc9-4aaf-9bbe-24a4d8869607/muwofosadezebojolot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b253dc5-5535-4418-a848-28d2f2dc7227/67605863882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1436fcc-fdb4-4080-ac03-abb03c690418/13815732551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7759/4013/files/imperial_armor_index_astra_militarum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3269/1367/files/60140366101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5803/1511/files/dune_frank_herbert_romana.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_off00006717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6717 5536 bytes
SHA-256: d93e498178ba437db115bdec4329729b3448f8c1daff2937088992e2987f8323
font_01_sfnt_off000079d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D2 10400 bytes
SHA-256: 2933adc7db63b45b080f3223799b043587d48f7587fe44a11bcf6fafe9d631e2

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