Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1812c4718d7fdbf…

MALICIOUS

PDF

35.3 KB Created: 2020-10-10 13:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 347d2dc6ee1b097110706d9fe04722ff SHA-1: b58a6d67fd053282499ea4389cbe22ab967a67a8 SHA-256: b1812c4718d7fdbf495d954aa888442124b5ebb319b6d96ee0de1ceb85e935e5
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=mercury+service+manual+33 In PDF document text
    • http://files.sproutmeadows.com/uploads/1/3/1/6/131637273/bb180bd5e9.pdfIn PDF document text
    • http://debejusag.kcsbuttercream.com/uploads/1/3/2/6/132695925/eb7439.pdfIn PDF document text
    • http://files.bakersfieldbirthnetwork.com/uploads/1/3/1/4/131438157/941260.pdfIn PDF document text
    • http://files.endurancebrasil.com/uploads/1/3/2/6/132695489/xelikadapevone.pdfIn PDF document text
    • http://files.turtlesrock.org/uploads/1/3/0/8/130813834/xodizid-fawunap-dofibosizu-kewejoxukira.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/1/0484/7406/3002/files/78969793735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9310/7902/files/revised_ranger_monster_slayer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4311/8495/files/fefega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/fitazirujudasujijewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57beb872-bc2a-4ff2-94ef-cdd12278a587/fisudobasogawirapuvifafex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9622/3133/files/tiguan_manual_key_start.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4020/9056/files/83608726226.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_off00004c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2A 5276 bytes
SHA-256: c619431de668931ec5adef7cbe553f1c60e9031e0abfc3038b681092a5ea5196
font_01_sfnt_off00005e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E16 10364 bytes
SHA-256: 2e37da29162cb378812bfb946c7a4f6da5131a8deddc720dcb4a8dca6d861dec