Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2855a56270e1fb…

MALICIOUS

PDF

44.3 KB Created: 2020-10-20 15:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: 2a7002d17f93fd2d4349f303daf37d4a SHA-1: b0e25263d2ea1503bf1f3382e2030a4c7c9a0d0e SHA-256: fb2855a56270e1fb3bee8f6abdcbeeda299f85b65bf2876e3b0318723b5c3217
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://gettraff.ru/pify?keyword=publisher+to+pdf+free+online+converter In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/nesubine.pdfIn PDF document text
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/kapugidipogabuji.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/0feaf55178ef.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.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/1/0486/0752/7077/files/c_excel_worksheet_listobjects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/272befae-d5b5-4879-9823-c96c161c5355/xofojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44efc789-5df4-4bfe-b171-58a511ec63d2/43880882306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f9daf47-08dd-4293-a405-90ef68c59564/bilolelijerilowalilalokos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1541/6219/files/box_tops_for_education_submission_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9198/3013/files/bidufuvanezedivala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02869ada-27fa-4b1a-adaa-65462512cd51/56167127778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356a493b-1eb9-4184-95b2-3f785f05930e/24032136438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1af39c4-f579-41b2-9903-a6ec68fa5bf7/90325301172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e551b7ef-ae92-4dad-9078-dfef767c61f3/gezafokosabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208d2001-7872-4c87-896e-9509361cf873/sojaxifire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0929/2472/files/rijataxewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6444/9431/files/budgeted_income_statement_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8096/6040/files/dibugodivuwudosaxejoneme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3303/3366/files/fbi_stand_for_funny.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_off00006d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D97 5236 bytes
SHA-256: 2d95b7f666b624f2c29559175a74ce0228b6b21b5361e98ef6bbda4af8f6f6f4
font_01_sfnt_off00007f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F54 10720 bytes
SHA-256: 0e2cb23b934b1504bc4606c0f2a07cb8e8cf68235e8d996849e78b8a47da2869

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