Malicious PDF — malware analysis report

Static analysis result for SHA-256 762881d43b09f7cc…

MALICIOUS

PDF

181.7 KB Created: 2021-03-17 16:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5e50b849c1d3fcad6c28d59fd3e88d55 SHA-1: da0f5acb309b41cc9c1e58ba1b1bf5dd0586ab1e SHA-256: 762881d43b09f7ccf4d6fd250422dcbdd6b530575d0ccf4f8e12e2f2b0ef6621
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, with one prominent URL pointing to 'jottigo.ru', suggesting a lure to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm designed to distribute content, further supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wb?keyword=cyberpunk%20red%20core%20rulebook%20pdf%20anyflip PDF link annotation
    • https://dunudafulu.weebly.com/uploads/1/3/1/0/131071166/lazisisobogo.pdfIn PDF document text
    • https://lerekisisag.weebly.com/uploads/1/3/1/4/131408666/govap_gisalup_laxipevegatajum.pdfIn PDF document text
    • https://nabudurokaralek.weebly.com/uploads/1/3/4/5/134576841/78482e1a003b7.pdfIn PDF document text
    • https://cdn.sqhk.co/pevizopubok/gGiaJid/dusuwenexadoju.pdfIn PDF document text
    • http://pipazodonuwadu.iblogger.org/kesupepeb.pdfIn PDF document text
    • https://ganafotereko.weebly.com/uploads/1/3/1/1/131164127/dutos.pdfIn PDF document text
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/fefomobeme.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/ieRjclC/instant_center_drag_racing.pdfIn PDF document text
    • https://kijomexed.weebly.com/uploads/1/3/1/0/131069838/venefelekaleluzekov.pdfIn PDF document text
    • https://jawetixadal.weebly.com/uploads/1/3/1/6/131606755/1446211.pdfIn PDF document text
    • https://sulewonabesonu.weebly.com/uploads/1/3/2/6/132682327/f40e17b666ac.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/dghgchc/julovirawak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/60838724807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f371bbb4-35e2-49a1-8121-6b8c79f87cae/56412075640.pdfIn PDF document text
    • http://fegarezitima.rf.gd/6th_standard_english_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/pilidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1cbcc6-b6de-4c9a-9e7e-28939b98f563/present_simple_exercises_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2813fb75-c51f-4a2e-a37e-bc118f132301/91944767189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb25d63-c2ed-4786-a6fb-51a50c41c22d/importance_of_energy_efficiency_in_everyday_life.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/xepidi.pdfIn PDF document text
    • http://vezedusevu.rf.gd/how_to_change_your_address_on_your_health_card_in_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/who_moved_my_cheese_quotes_meaning.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_off00028ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28EC4 5180 bytes
SHA-256: 31fda22ae77a01f656b689e12bf8053671f6bd92db4b09341211183835d0c6c7
font_01_sfnt_off0002a078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A078 12328 bytes
SHA-256: 18f0b86217aa37829796e58b5e99c0e3f8b1ceb520b631a4e21d048749aaaabd

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