Malicious PDF — malware analysis report

Static analysis result for SHA-256 71fd25f75b391d72…

MALICIOUS

PDF

52.6 KB Created: 2020-09-30 08:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8bede6ea8e18b1e82efdbcd9dd78275b SHA-1: 60a128d1f3e393e2a966fb5241366ae1fd9e6705 SHA-256: 71fd25f75b391d72ef42426d9a6c492e58629c15dd8d6a1998384d8525ac9f51
124 Risk Score

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=1000+solved+problems+in+calculus+pdf In PDF document text
    • https://site-1037869.mozfiles.com/files/1037869/pigonufekesexo.pdfIn PDF document text
    • https://site-1037172.mozfiles.com/files/1037172/53372815455.pdfIn PDF document text
    • https://site-1036902.mozfiles.com/files/1036902/lipubiresiv.pdfIn PDF document text
    • https://site-1036996.mozfiles.com/files/1036996/piloxobemajadudezeruj.pdfIn PDF document text
    • https://site-1036734.mozfiles.com/files/1036734/39249071527.pdfIn PDF document text
    • https://site-1037122.mozfiles.com/files/1037122/mavobepidupatupar.pdfIn PDF document text
    • https://site-1036754.mozfiles.com/files/1036754/bosifetetomewukunijus.pdfIn PDF document text
    • https://site-1037839.mozfiles.com/files/1037839/18601189909.pdfIn PDF document text
    • http://files.partylandiaoficial.com/uploads/1/3/1/4/131407355/wosepetejope.pdfIn PDF document text
    • http://files.glsgroupllc.com/uploads/1/3/0/7/130776535/679394.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://cdn.shopify.com/s/files/1/0438/5941/1094/files/lippincott_manual_of_medical-surgical_nursing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9373/7886/files/23490472485.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_off0000831c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831C 5404 bytes
SHA-256: 8ce6b0201c8dd82f51cd4317274b6ec32fbd7384c2e7412b213a93283f05f29f
font_01_sfnt_off00009550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9550 9964 bytes
SHA-256: 6ec3409dc77161933f5e809c634948609a627b9e4fc4f2e3255abb670cd2cbfa
font_02_sfnt_off0000b725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB725 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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