Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5c5471933c5435…

MALICIOUS

PDF

90.8 KB Created: 2021-04-06 15:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7865ce3640a9ab631d67b559d30adc99 SHA-1: 587b3442f421243cbf1d2265531b919fd3660fd5 SHA-256: 4a5c5471933c5435e15f91f696f56048ab6ad1b346161e781eaf4916ff59f9ae
126 Risk Score

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 0.9990

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/wix?keyword=phantasy+calradia+necromancy+guide PDF link annotation
    • http://blog-millionaire.buzz/32364547974r6j4u.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://euroshopmn.space/699980477285wnep.pdfIn PDF document text
    • http://bluebadge-support.com/how_to_eat_move_and_be_healthy_downloadxpfs1.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/how_to_lose_weighthfciq.pdfIn PDF document text
    • http://getporte.xyz/sagewaxp2dr4.pdfIn PDF document text
    • http://save50.pro/new_jersey_residential_lease_applicationzxjq0.pdfIn PDF document text
    • http://titanovyi-filtr.ru/din_1696232be6.pdfIn PDF document text
    • http://robot3.site/munowikoxifupuvtwy8.pdfIn PDF document text
    • http://airned.ru/725010107658wn58.pdfIn PDF document text
    • http://tehnikator.ru/causative_verbs_exercises_with_answers_doc04hec.pdfIn PDF document text
    • http://rimka.xyz/90188342871rs5l1.pdfIn PDF document text
    • http://cleanup-sale.site/36092935968br4ox.pdfIn PDF document text
    • http://lujoxowuri.iblogger.org/saucony_guide_10_stability_running_shoes.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
    • http://junedujivoxoz.epizy.com/zirixamukasebenixaros.pdfIn PDF document text
    • http://nivawuxiki.rf.gd/kirosakefapexuxawuwem.pdfIn PDF document text
    • http://lexupatomenoj.epizy.com/biochemistry_questions_bank.pdfIn PDF document text
    • http://fixobijuruloluk.rf.gd/gorewinijikiro.pdfIn PDF document text
    • http://vamazoligosuni.rf.gd/chemistry_apparatus_images.pdfIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_25a8bf869ea9402db4d3560d0805ae8d.pdf?index=trueIn PDF document text
    • https://c3bb11cb-ba02-405d-8462-2b4421b436e1.filesusr.com/ugd/4c7814_0dd5b44d896a4d23979f1353d90bf91a.pdf?index=trueIn PDF document text
    • http://wijijatalil.epizy.com/carousel_horse_invitation_templates.pdfIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_5649111175b14895a849232828922a18.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B6 5336 bytes
SHA-256: 11eb4005d009bc0a777d747cae43863c729c82583d0518654543d4b9e9a2b27d
font_01_sfnt_off00012aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA7 10700 bytes
SHA-256: 9c7165752f9258c2b603d2036261dd1fc586b80eea2a508e8a151bfc1e23a214
font_02_sfnt_off00014f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F65 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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