Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f335bc58f6aba09…

MALICIOUS

PDF

80.4 KB Created: 2021-04-17 03:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fb72c37b9209292473701e9aa72b33c9 SHA-1: cc0fef286bf01505dc1b8f19afe48d060216a913 SHA-256: 0f335bc58f6aba09d8b6404fa6c3bdede582537399f95161375f28095025cb89
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://nipisod.ru/strik?utm_term=kaba+safe+lock+reset PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393779/normal_606b5bedd7010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384046/normal_602d523220dd6.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://uploads.strikinglycdn.com/files/4fb712bf-13e5-4154-be2f-2d0322ad8802/dork_diaries_14_sneak_peek_2.pdfIn PDF document text
    • http://fodapimogu.rf.gd/dinesimuritoronuguzoxonup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429ff680-1065-45dc-b06a-a0afd5693e64/maytag_5000_series_dryer_screeching.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/865097ae-dc01-4752-94e3-77beb69388de/what_does_wod_life_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00a8148-1101-455c-b237-32d4953190da/12161222418.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/dokineb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90c018df-217a-44b6-b1ea-23ef6a41b1c3/how_to_install_git_on_windows_10_command_line.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d5698ee-2785-475c-8d75-373404d1a45d/what_to_do_when_buying_2nd_hand_car.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/asidosis_metabolik_pada_anak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95d95a4-dad8-4670-aa52-72e3c1af8812/74143512394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd1a11c-505b-4552-84f1-67ff7d521a58/what_are_two_central_ideas_of_the_poem_ulysses.pdfIn PDF document text
    • http://kosogomozu.epizy.com/chrome_latest_version_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/49982852226.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_off0000f096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 4684 bytes
SHA-256: 89e19bc6f736cd49302a19a6d587dd4a0dd806cf035cbd41d2fd5c8251d2499d
font_01_sfnt_off0001008e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008E 11240 bytes
SHA-256: 080ba7204d98bc5f045e82afb02e3e85b0e74e274574fe0ff2d7cfc8869d9175
font_02_sfnt_off00012664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12664 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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