Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba4e1cbb88c7a4f…

MALICIOUS

PDF

131.2 KB Created: 2021-04-08 02:33:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d68da8af94b0f57a51268c81a40133de SHA-1: 51427cd1f02791e0c75a0a8f067da9803fa996b4 SHA-256: eba4e1cbb88c7a4fb8012cd3907f5a6cfdc3b4c729934abe83ac1d0e96d51f50
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The embedded content, though heavily obfuscated, likely serves to redirect users to these malicious or spammy URLs, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jumiwimov.ru/123?utm_term=alice+in+wonderland+english+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4528915/normal_602e42bdc822e.pdfIn PDF document text
    • http://fashion-deals.xyz/dunkin_iced_caramel_latte_nutrition_factsa4six.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426260/normal_60647ff59bc0f.pdfIn PDF document text
    • https://manoduxasef.weebly.com/uploads/1/3/4/0/134041035/simesikovisuta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445877/normal_5fffee79845b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415770/normal_6008b5f70e07e.pdfIn PDF document text
    • http://homearfes.com/dell_e6410_laptop_pricep9gph.pdfIn PDF document text
    • http://trokot-shopnew.online/brother_ds-720d_error_code_2019nmry2.pdfIn PDF document text
    • https://xerirexu.weebly.com/uploads/1/3/4/5/134592073/8974724.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445735/normal_5ffed334263c8.pdfIn PDF document text
    • https://vedabigejiko.weebly.com/uploads/1/3/1/4/131438046/5309492.pdfIn PDF document text
    • https://lidimegofomizut.weebly.com/uploads/1/3/1/3/131380930/duxemilu-sazipimo-wozev-fukabowas.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://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_8985db0ed7ac43cda1ee651749814cca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b352fcf5-cc3c-4db5-8cee-9406db3e79d6/jbl_flip_5_eco_edition_kaina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d00fc043-1498-43cf-a1cd-a938cb07d199/buzukekipaxamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae343f39-8f08-44a6-b4d2-3bb8f903f910/pofatepajugimas.pdfIn PDF document text
    • https://de461234-8179-4892-b46d-67dc01ae00af.filesusr.com/ugd/69bbc5_700f5a14f27547f4a02d93e6ea14ace9.pdf?index=trueIn PDF document text
    • https://a819be37-316e-4347-83bc-b067fb6953c8.filesusr.com/ugd/d5662a_7cbc128b0e76446e961038ea5358c1ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff0083a-3394-49a2-8433-ec15bcdc73dc/13017899726.pdfIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_0a15c6ebbfec452f8a6b4fe0fb78ca88.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b87063-f395-4309-ac1e-5ebe336bc8b5/how_to_get_rid_of_acne_with_diet_clear_skin_forever.pdfIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_f233d0dc70ca4327a75a769d9bf00694.pdf?index=trueIn 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_off0001b567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B567 5204 bytes
SHA-256: e49af5d624427cb81cf2c863d783907753527fad2a94799917ae130fc90a494d
font_01_sfnt_off0001c6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6E9 12932 bytes
SHA-256: 2155709df4725a9d27ea99d24d5343e55cc159b315af1c9b13db85aaffa13175
font_02_sfnt_off0001f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0C1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176