Malicious PDF — malware analysis report

Static analysis result for SHA-256 74634afa36ca1ef2…

MALICIOUS

PDF

75.5 KB Created: 2021-05-01 04:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f6f62731a9759927a2747cfbdccf126e SHA-1: ac027483aed509cda98c17e3aac492f2ac5f4b81 SHA-256: 74634afa36ca1ef2d3f26c71537df1a43bf7e1a3932227f9621abf830ddd0e61
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL leading to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. The document body, though heavily obfuscated, appears to be a lure related to salary information, further supporting a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=what+is+a+project+manager+salary+uk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424646/normal_6056c32c87b36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5fd876ca6bafc.pdfIn PDF document text
    • http://meetraisins.club/possessive_pronoun_worksheet_grade_4gmn20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_5fd63b6df2b8e.pdfIn PDF document text
    • http://buloshnaya.site/zilavekopewn4.pdfIn PDF document text
    • http://4gusevshop.space/37501970430laqoj.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/kotenu/businessman_songs_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/dudewenorabugux.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/design_and_analysis_of_algorithms_handwritten_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db69add-9514-441b-a634-280a2d9cb249/long_haired_dachshund_coat_type.pdfIn PDF document text
    • http://jazopizebe.atwebpages.com/hipospadias_y_epispadias.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe404b04-2a1c-457a-a86c-5785066152ab/battleheart_legacy_2_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0773823-6e2a-431f-97f5-d8d34e46e9da/if_two_players_have_a_royal_flush_who_wins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa956b4-0d72-484d-80a9-e01468af51b6/77805252676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/163f903e-972c-4598-987b-01c383ffb4a7/daily_goal_sheet_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/tekken_3_video_game_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e467f61f-2127-4bf0-9787-2fbd24b05810/50072762769.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/android_english_dictionary_api.pdfIn PDF document text
    • http://pupagerirawax.myartsonline.com/can_you_flat_tow_a_dodge_durango_2018.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_off0000e97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97E 5604 bytes
SHA-256: d2c85367574268f173a3ef54fab7ea0552ae11ac2051f0be6eae97c7c68a8f83
font_01_sfnt_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 10068 bytes
SHA-256: 735a4d2c174259a9287947094fdec6b09688fad64780843f2397930e1efda193

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