Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3b2fc833327462…

MALICIOUS

PDF

80.1 KB Created: 2021-03-23 00:20:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ccf2a29a1b70ae572ec164548ef24585 SHA-1: eb664dceb5fd9eb5a604996490058b3e2ea71ca8 SHA-256: be3b2fc8333274621d4278d0bafc61240ab41b05bdd37facc874772cfbebb9ef
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 a large number of embedded URLs, many pointing to disposable hosting, and one prominent URL with UTM parameters suggesting a lure. The document body, though heavily obfuscated, contains keywords related to a "champion generator cover home depot", indicating a potential social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jottigo.ru/strik?utm_term=champion+generator+cover+home+depot PDF link annotation
    • https://cdn.sqhk.co/vilitemeru/gjcjjjf/free_music_production_software_download.pdfIn PDF document text
    • http://kulovemalam.22web.org/95362284.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/e9OJxgc/33318423640.pdfIn PDF document text
    • https://jejofiwapo.weebly.com/uploads/1/3/5/3/135312812/pomuvuj-nugafozalajo.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/icKFjZc/mimpi_gigi_copot_atas_tengah.pdfIn PDF document text
    • https://cdn.sqhk.co/nonobepimaf/hemHihd/44706839579.pdfIn PDF document text
    • http://rufopaf.22web.org/software_testing_interview_questions_and_answers_guru99.pdfIn PDF document text
    • https://jasenumuruj.weebly.com/uploads/1/3/5/3/135309327/2954816.pdfIn PDF document text
    • https://penopamez.weebly.com/uploads/1/3/4/4/134496097/ritotavazosi-vekavi-xarijof-xagajaveriri.pdfIn PDF document text
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/a695d034b8d3.pdfIn PDF document text
    • http://befemuvejizu.22web.org/winrar_for_pc_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/dawafawux/gj2rgiy/cowboy_caviar_with_good_seasons_italian_dressing.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/dufekifaral/33183193761.pdfIn PDF document text
    • http://sinipuxi.epizy.com/70246100718.pdfIn PDF document text
    • http://kuwokezolofe.epizy.com/lotafenogasivaro.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/95310297561.pdfIn PDF document text
    • http://xizuzaziz.rf.gd/ashcroft_temperature_gauge_ordering_information.pdfIn PDF document text
    • http://zefefudu.rf.gd/88790996259.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/fujopubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb27aac-bc93-4609-bb70-9e0ee89d8674/kozuguv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f0e505-5c6c-4a75-89a9-cd6d18a9fb3d/gtx_970_vs_gtx_rx_570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f3a976-56b1-4078-ac99-956286456d6c/dan_brown_book_origin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3900c4-354c-4754-926d-5e0b609e4747/62892396826.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_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 5244 bytes
SHA-256: 14d5a41ba375a81c2551157822776bdf1840d60479e91e6588bcc1408e5ef9d8
font_01_sfnt_off00010cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB1 11300 bytes
SHA-256: 8e0a904cc70ef8e68cf71332ad02c58281e3b0de236e42c67894fc1bb6dbf1e1

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