Malicious PDF — malware analysis report

Static analysis result for SHA-256 55531482eb738b68…

MALICIOUS

PDF

97.9 KB Created: 2021-05-28 22:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c22cedca114e846c2884abedaf63e7ac SHA-1: 9562f33c647b768c103d108d58e911eb75513dd2 SHA-256: 55531482eb738b6815a2a2ab9987cc095f73e627302bb648a348d1a35d355234
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://ponafet.ru/strik?utm_term=black+desert+online+sorceress+guide+2019 PDF link annotation
    • https://xabanovodo.weebly.com/uploads/1/3/0/7/130739860/bokixorinujogepojula.pdfIn PDF document text
    • https://jatekowi.weebly.com/uploads/1/3/0/7/130776123/minatejegi.pdfIn PDF document text
    • https://jatuxifukonexe.weebly.com/uploads/1/3/4/4/134469885/valefepilenavaseba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446035/normal_6003ecd348d62.pdfIn PDF document text
    • https://gasogufimuti.weebly.com/uploads/1/3/4/4/134461051/naririwagusaletu.pdfIn PDF document text
    • https://zoponexe.weebly.com/uploads/1/3/1/6/131606878/woriwusipofemamovasu.pdfIn PDF document text
    • https://dakusarifupufa.weebly.com/uploads/1/3/3/9/133997242/gokajupepeluvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_602ba44e810d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_60405c53441a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5fd662602b81c.pdfIn PDF document text
    • https://javewadeje.weebly.com/uploads/1/3/4/8/134882586/duxufexibozaw_fuminax_konek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5fe7ce90cf99f.pdfIn PDF document text
    • https://nikokitigo.weebly.com/uploads/1/3/4/5/134500207/8388954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470224/normal_605ac0b4cc53d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_5fd1601fe7976.pdfIn PDF document text
    • https://puxefulido.weebly.com/uploads/1/3/1/3/131383426/wanemiv.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4461770/normal_60b003cfb23ec.pdfIn PDF document text
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/pegekadovagizozexaxu.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/30ff4ac1-0653-4022-aa5f-466803daa947/how_to_change_battery_in_garmin_nuvi_205w.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb74aa5-f36c-42bc-a05f-46d5a8a5516f/cfa_curriculum_changes_2020_level_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2edf0fb3-898d-4367-9d8a-ca085c172639/dememukukiwulani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc4e14d-8923-466c-985a-a169fa346985/how_to_use_copper_brownie_pan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/496ff5ad-3bb3-4030-b4d5-78eb8135c943/2012_dodge_avenger_3.6_oil_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52f92035-7811-4714-b52f-a2026d250fa1/78047169527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b8455d-7f7f-4d34-8993-216ad1de5005/is_dark_energy_pre_workout_safe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e3e46f-e1b6-49e2-9d1a-dfaa46983c8a/83547321644.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001258f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258F 5704 bytes
SHA-256: 1cbcd9d8e889750a653c1fe130cbcdf9ee10147e1db4f34f55c4790db6c954ce
font_01_sfnt_off00013904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13904 11420 bytes
SHA-256: fcadde1f6febf3dc476b36abead37fb7efbe1a083f716194d1e1190759ba889a
font_02_sfnt_off0001600f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1600F 17120 bytes
SHA-256: 4b41ab1d27c846a6c7af25254e0763ac9adc52b4bcf20cb8a5a8073ba7136a4a

Open this report in the interactive analyzer, or submit your own file for analysis.