Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba1f43693e6a779…

MALICIOUS

PDF

85.6 KB Created: 2021-04-17 08:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 516c103155a7409a7a58dde1e36cb821 SHA-1: 869388893a2a9e4ae5db9b2cceac2fcbc5a2d2a1 SHA-256: dba1f43693e6a7791b3bcd8b62adeed6bc47c281269466995bc36615cbcbabcc
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'dugedepap.ru', suggesting it's designed to redirect users to potentially harmful content. The PDF structure and the presence of embedded URIs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=dbpower+action+camera+ex5000 PDF link annotation
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_601d27e9235a8.pdfIn PDF document text
    • https://cdn.sqhk.co/zudipoje/0Xjdgdf/sms_forwarding_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/ajdibhg/age_of_empires_3_hack_jar.pdfIn PDF document text
    • https://cdn.sqhk.co/varomapit/rjilABQ/wedakevezuzupotejebovepu.pdfIn PDF document text
    • https://cdn.sqhk.co/darojopul/k2RjiAy/bollywood_songs_mp3_download.pdfIn PDF document text
    • http://tejajugumoneton.66ghz.com/sources_of_reliable_and_accurate_nutrition_information.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470232/normal_5fc7dd9202ebb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_60679db83fcb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xamunenefo.rf.gd/cnidaria_characteristics.pdfIn PDF document text
    • http://nunevenesaxo.rf.gd/garmin_gpsmap_vs_echomap.pdfIn PDF document text
    • http://sabasil.epizy.com/english_pronunciation_american_accent_ear_training.pdfIn PDF document text
    • http://mobaramitutukox.rf.gd/philips_avent_bottle_warmer_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/wovenoropefajez.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/bowepaganid.pdfIn PDF document text
    • http://doledetaxezo.epizy.com/corporate_finance_ross_10th_edition_solutions_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC68 3392 bytes
SHA-256: cdd80873ddb6a519a5178d37407fc537b9827480e53b3ae4aac1745d5bc565fb
font_01_sfnt_off0000f887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF887 5436 bytes
SHA-256: 19c34f55cb185d25849ce192b3c2428c04f0604317e6e6a5984a3ce17119a0ff
font_02_sfnt_off00010b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0B 11832 bytes
SHA-256: 6e9b4a8fe9b64be1862b3877cc8f9579353e36e9e5e23b6ff1e8652a75ca85c7
font_03_sfnt_off00013391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13391 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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