Malicious PDF — malware analysis report

Static analysis result for SHA-256 90208e2da2ef1009…

MALICIOUS

PDF

79.1 KB Created: 2021-05-31 04:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 14bf21209ed366df224bd38e42e21c2f SHA-1: 4fbd58ef74b5236311e86a289da8af788b88d7e9 SHA-256: 90208e2da2ef100979aedb6cf6988b70c0dc55508c6c5106f4a27e9f4096cc41
244 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious content. The embedded URL points to a redirector that likely leads to a phishing or malware download site.

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://dafemum.ru/strik?utm_term=how+do+you+day+trade+bitcoin In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_604d4269473eb.pdfIn PDF document text
    • https://foxanebipukete.weebly.com/uploads/1/3/4/3/134309218/zevozisakid_kijigixa_tuworar.pdfIn PDF document text
    • https://lowutifita.weebly.com/uploads/1/3/4/3/134352456/zevigini.pdfIn PDF document text
    • https://jikodidujur.weebly.com/uploads/1/3/5/3/135319234/1430614.pdfIn PDF document text
    • https://wivapofeselaf.weebly.com/uploads/1/3/5/3/135317026/dateporisa.pdfIn PDF document text
    • https://bezesigut.weebly.com/uploads/1/3/2/6/132681157/5f59fece.pdfIn PDF document text
    • https://femadupimasimu.weebly.com/uploads/1/3/4/5/134594559/edca4ee503.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494138/normal_5fcf06bee1532.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/74071cda-7eda-4dce-a6cc-e8811143157b/evermore_alyson_noel_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba2b71f-af57-42b7-968f-181df588aa18/ingersoll_rand_ssr_ultra_coolant_msds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c419502-d1ab-4958-8c3b-931b230294a9/43582961799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97fb2fcc-cebc-43d1-9473-7dd86d6e8b32/stihl_ms170_chain_file_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc344545-4007-4ce6-b876-16039072c8e2/how_to_wind_a_bobbin_singer_stylist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa43d3a1-2bd2-4b97-9075-83d12e9ca2c1/how_much_is_a_yamaha_flute_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca5c81b-d969-4f1d-b1b5-3cc29b866691/46971360816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff078ae4-71b5-4ab7-a857-718e4cf8ba81/tinakule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a22182b-c3f4-4f61-8ef0-1524efcad614/rope_hero_vice_town_mod_apk_5.0.2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/269fc17e-f2e2-4cad-ba3b-fb5e673c1727/music_notes_drawing_free.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_off0000f7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 5016 bytes
SHA-256: 9bb417ab8c9188871dadbfc13ecbcae2edb4bd33a2abcb5fa8a6ca40e7dae1c8
font_01_sfnt_off000108ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EF 11216 bytes
SHA-256: 0315a00b810bc2b17250eec609ca06a63dcd55adc0b0593b6c4e3ab8b5ebb92e