Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c671ab27df042a2…

MALICIOUS

PDF

56.0 KB Created: 2020-11-04 02:55:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 93dfde8d92835ebd4fdc69ee97bcc6f8 SHA-1: 96ba57b02d3a3aac4ba674698bc40c8bdb15f164 SHA-256: 8c671ab27df042a22078d2f5a8a63587e39b6b1860fe8b179c63e5317939b5b9
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=lahn+awakening+skill+guide In PDF document text
    • https://gikatufezido.weebly.com/uploads/1/3/4/3/134338368/5381924.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/tepojabatu.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/5615478.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/852cc81aa156.pdfIn PDF document text
    • https://keruzexutebimoz.weebly.com/uploads/1/3/4/3/134310977/2320220.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/belapawerezuju/85433591447.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/ririjixixufuxububuwiwuje.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/9371653613.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/clements_family_nc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a41024-cf7e-4dac-a0be-d7749160c3ba/75072358818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7231739c-90d9-4cc8-b300-4ce6c809e3ed/shotokan_karate_heian_shodan_kata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3269/0339/files/telogen_effluvium_patient_handout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab993cfa-b8b1-42ef-933f-c43ee8b9b10c/the_hr_answer_book_shawn_smith.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000919f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919F 4780 bytes
SHA-256: 1622c14c0067aa613e2f2147a9dc40a11e7310cc6714cb81543a31d6627715fe
font_01_sfnt_off0000a1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1DB 10272 bytes
SHA-256: 5c347f30617e24506c2f0a5dfdb019b4081b0cba074acfd6a7740ebc3114e457
font_02_sfnt_off0000c4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.