Malicious PDF — malware analysis report

Static analysis result for SHA-256 607d07f02faf76cd…

MALICIOUS

PDF

81.3 KB Created: 2021-04-02 18:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: feb93fba65559d33635fed8150fe1148 SHA-1: 911e3677d1ec23459fdb218e35c80f39189f879b SHA-256: 607d07f02faf76cdcea6116ff8c3a3fedcbf1e0e1ece8592acc1910094f20ac3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

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://jumiwimov.ru/strik?utm_term=we%2527re+gonna+party+like+it%2527s+your+birthday+lyrics PDF link annotation
    • http://gtmedis.com/24722433829d6gt2.pdfIn PDF document text
    • http://sbrf.link/6060808209384hi4.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/27605083974.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/bjdShc9/zefegafoba.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/nDigehd/hero_xpulse_200_bike_accessories.pdfIn PDF document text
    • http://universityru.fun/guxudevaxamozaztgtvf.pdfIn PDF document text
    • https://cdn.sqhk.co/widagawinud/idCpffd/job_application_format_in_english.pdfIn PDF document text
    • http://worodariravo.22web.org/sebedeku.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/finding_your_inner_fish_summary.pdfIn PDF document text
    • http://copyrightram.net/rahul_sardana_electricity_and_magnetism_free_downloadtd6y7.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/xiigCzG/33252893043.pdfIn PDF document text
    • http://tixokapine.mypressonline.com/sodekezoxisawefuve.pdfIn PDF document text
    • https://cdn.sqhk.co/vomuvojovi/e3hija3/bubble_shooter_game_java_mobile.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://zokudubogot.epizy.com/natural_bodybuilding_workout_routine.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/72621810795.pdfIn PDF document text
    • http://xubibufopude.epizy.com/android_charsequence_add_item.pdfIn PDF document text
    • http://sulumasofip.epizy.com/table_of_plenty_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5943daf0-3cd4-4b8f-8acd-61007ee17bb9/15633740572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45946122-927f-41de-90cf-a3d18d4056ca/lixejunakumew.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/jeninamukexajab.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/zomolitudawowinu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B0 5572 bytes
SHA-256: f550cdb051425d217f755c89f98e7dc68eeb86f4250fe7d96626c0d6bcb39051
font_01_sfnt_off000104a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A5 10540 bytes
SHA-256: a166d37f23116e294bf6f9cc9ffa83b8b267230280cb43193461b8b3552093c3
font_02_sfnt_off000128d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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