Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da68b99f5970519…

MALICIOUS

PDF

79.9 KB Created: 2021-04-27 08:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a30f0e5e2b81c238a4c2e7cf73cdcb6f SHA-1: 971b5e013017693e4dc613117aa8ed0fc422841a SHA-256: 2da68b99f5970519578c68c0aba803f6234b0e513eb48e646b9845bec2c61407
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=why+is+my+onn+tv+remote+not+working PDF link annotation
    • https://cdn.sqhk.co/fajoliteve/heCjcmJ/25961460562.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386849/normal_5fddc10fd4171.pdfIn PDF document text
    • https://cdn.sqhk.co/kozosorole/aXjWicq/xusexodojaru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452148/normal_6017c53559d72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_60241ab0b7024.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/iaJDIjj/vimiga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_6060a24977aa4.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/53ceef57-1bb9-47fa-94e1-685bb47d3f60/69160470743.pdfIn PDF document text
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_1f5df2c10fab45a59a2a8969cda51971.pdf?index=trueIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_c5b6f397af12465eb346cddeb8af62e7.pdf?index=trueIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_f7b919fc28de4138a45661be7b2ae894.pdf?index=trueIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_beeb773a1662400db5d423423c640217.pdf?index=trueIn PDF document text
    • https://36ba0bd5-485c-4bd5-924f-6a5e18dcb854.filesusr.com/ugd/96419b_7d8047ae37bc4fa595deee4c2ea78747.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8163f2e-dd39-49d7-9ffd-cf06fbc7c871/d_link_dir_825_firmware_update_download.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_5b275b4f6e424682b4d155a8b49bd560.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40762ba-7e81-4ce6-9d15-7e3f136257a9/33870433948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501854ea-e41d-4d21-a79e-2bcfd30dbaac/does_hillsborough_county_have_school_today.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/indian_instant_pot_cooking_recipes.pdfIn PDF document text
    • https://520c840f-7702-4e28-87de-278da5b03b63.filesusr.com/ugd/e633b3_7d01aba6fca447f4a4e29901ab775a77.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/158cac98-712b-4377-b0dc-af827a95b9b7/gakelajegojogajev.pdfIn PDF document text
    • http://jifimurosesapu.atwebpages.com/98106602287.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_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 5188 bytes
SHA-256: ee103227d77a728d055c9eb5c4407557db15ae0a72531cda71d4b2a4cfb00fc1
font_01_sfnt_off00010c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C85 11128 bytes
SHA-256: 6d42459e5ff14fd98eab15049cc5c3112f479b4e8bdd534e5d394e92fd54666d

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