Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65bdb24a2b73b2f…

MALICIOUS

PDF

74.9 KB Created: 2021-05-25 13:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2795822cd603933dbc1dadba944ed95e SHA-1: 7f2520743dc7f0c6f31ff03d6d0b0ad521b6502a SHA-256: c65bdb24a2b73b2fa45a4a3e885f4c36c3dc7c9933665ef8dfcdd5d378b3a0d4
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating it's a phishing lure, specifically an image linking to an SEO redirector. The primary malicious URL identified is https://botokaw.ru/strik?utm_term=flat+stomach+workout+plan+pdf, which is likely used to deliver a secondary payload or redirect to a phishing site. No scripts were extracted, but the overall structure and URL suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=flat+stomach+workout+plan+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502920/normal_5fdc1b1bb6c44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_601f45d024154.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf02cca-b44d-40c1-9233-23d7d6e7495e/58473706620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64640ae0-9140-4fe8-b98a-b2326afc0b81/line_6_bass_pod_pro_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451c6211-197c-4073-b121-4cb982963cd4/counter_culture_david_platt_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/businessman_telugu_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/kujamepajogafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c92d754c-edf0-41df-9ef7-33f90fef0e95/dibusejaxererozuwasonari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90817e5a-ef0f-43c5-987c-81cbd1413282/83683496933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d7eafd9-d9cf-44ae-b041-148a25b6022e/does_the_logitech_g29_work_on_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12419f06-e3dd-46d2-a48e-04c33795d76f/37314748958.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/konica_minolta_bizhub_c258_treiber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da37ef4a-b5dc-4720-a558-f09e8e93fbf3/how_to_use_the_singer_hand_sewing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ad3b05-1d21-49a9-b124-6d99062270f8/toro_snow_blowers_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/fopugelowizakunoxavuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea3dce5-31f5-469f-b039-159982cccaf7/raribodonewovoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4b7f32-7564-482b-b044-fa90461538cf/44286377818.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_off0000e6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B5 5508 bytes
SHA-256: 3d02c94b0f2c75ca2e0e220658498eb8482d3c9ec6a9780cf087f9c49dc98742
font_01_sfnt_off0000f95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95B 10688 bytes
SHA-256: bb22964e2bea3dddd4219a80447e88b6e5a8533b9c9d4604b31aa861043d69a3

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