Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07969997b22e025…

MALICIOUS

PDF

67.7 KB Created: 2021-01-25 15:21:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c0c5e2ae9fe96856fdebb2b804de9a17 SHA-1: 95d1fe700145a2b9e43945a9aa14bf3d58e1d105 SHA-256: c07969997b22e02532291ba2eff31579280991b284bfd1c2766f893740eba99c
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm hosted on disposable domains. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URLs suggest the document's purpose is to lure users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffmen.ru/wb?keyword=hand%20tossed%20pizza In PDF document text
    • http://verezitabel.66ghz.com/bookworm_deluxe_for_mac_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/fVUhiGu/coloring_benefits_for_seniors.pdfIn PDF document text
    • https://dezubawutojowi.weebly.com/uploads/1/3/1/3/131398539/970097.pdfIn PDF document text
    • https://vufupobuzalezu.weebly.com/uploads/1/3/4/8/134853030/8507909dd1a9dd4.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidazi/XSv4B4S/bucket_list_notebook_ideas.pdfIn PDF document text
    • http://dixajadabaw.66ghz.com/corpse_bride_piano_duet_notes.pdfIn PDF document text
    • http://vejinow.22web.org/medical_term_for_bone_forming_cell.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/To4ghe1/didofivasufitejekojojo.pdfIn PDF document text
    • https://pigukoziluluz.weebly.com/uploads/1/3/4/8/134896600/disukadejafogeto.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/0jjsVdt/battery_powered_lights_with_timer.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/jgW5ijN/disney_emoji_blitz_wiki_gallery.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fedure/first_rank_raju_2019_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/mivegilodinadegufar.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/double_bed_sheets_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/divibibonivexopekenatuf.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/18389074993.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_off0000cd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD06 4836 bytes
SHA-256: 139ae8f9a6432eb2cfd55f151104a9cddc7e46f017d87367475e7d41b04b3e45
font_01_sfnt_off0000dd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD93 10344 bytes
SHA-256: e0295f790f9911fb4ac8fcf2a470295b97b86675977753f39c29ac0718cb45fa

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