Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fdfe60c52a3aa3…

MALICIOUS

PDF

87.7 KB Created: 2020-12-26 20:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: fa54472de65ecda625fa86212905307f SHA-1: 73f6e7d28f887c535578b4551b1d2817409fce61 SHA-256: 90fdfe60c52a3aa3d01007f566f5f11ff110eda9b8466494e9b56b32cb35e8a9
214 Risk Score

Malware Insights

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

The PDF contains a lure for Google Play gift card codes, directing users to a malicious redirector. The presence of numerous external PDF links suggests a link farm or redirection strategy. While no scripts were explicitly extracted, the PDF structure and malicious redirector link indicate a phishing or credential harvesting attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/123?utm_term=google+play+gift+card+codes+unused In PDF document text
    • https://cdn.sqhk.co/mepetiruzi/fjd27gi/67679545574.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/T4syTeL/kivovupuxanaku.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/igiaheW/starlit_adventures_ps4_split_screen.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/togatib.pdfIn PDF document text
    • https://litufefanim.weebly.com/uploads/1/3/4/9/134901191/poxawit-paxalozewijebut-rajox-fefulememu.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
    • https://s3.amazonaws.com/novifamigot/dwarf_fortress_quickstart_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/zizesapagowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4094282-7070-48be-b27a-e34d5f0885e7/26955405777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a20d70b7-1d1e-460e-8ffb-a36221642322/taladisikopukozaji.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/28106365952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d749a1-be96-4de5-b8c8-92dddffc92e7/driver_license_manual_texas_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/dating_websites_fight_list_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/senojug.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dacc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACC 16048 bytes
SHA-256: 54ae12f057a7c60b8c5b8b4b5183fc7d4d23bce2870d23af280cd9e47fa0faaa
font_01_sfnt_off00010dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFA 5336 bytes
SHA-256: 9d6422ecaa3785737e5c43b22431530ebe8de2abeea1f92db4ecc0b3bd13e719
font_02_sfnt_off0001203a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203A 10604 bytes
SHA-256: c820ce3a61619d7d0d89ac3dd0e11b0ef6717a27985a3ec4cd017a4a73f80c1d
font_03_sfnt_off00014327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14327 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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