Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1635521e5b74bf…

MALICIOUS

PDF

153.1 KB Created: 2021-04-10 04:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27122356d2532de8b75ea207565905ef SHA-1: 2e31513eb8b3ccf60f5bd4f881489004b9aed31a SHA-256: 6a1635521e5b74bf0e6740f3c50ba36c4993e7e6ecd9ff2f59d56f9a3b888187
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document exhibits characteristics of an advance-fee scam, including language related to payments and invoices. It contains an external URI pointing to a suspicious domain, likely intended to deliver a malicious payload. The presence of PDF-specific heuristics and ClamAV detection further supports its malicious nature, indicating it exploits PDF vulnerabilities to execute code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jumiwimov.ru/strik?utm_term=puyallup+tribe+per+capita+payments
    • http://rogevunesopu.medianewsonline.com/61410041199.pdf
    • https://zifofuxe.weebly.com/uploads/1/3/5/3/135386801/628ed3ff.pdf
    • http://form-lnstagramcopyrightservices.com/return_of_service_on_subpoenaj3ux5.pdf
    • http://gatorama.space/verisorodedumxffpc.pdf
    • http://cetapp.xyz/71983626188eut6h.pdf
    • http://yblda.fun/image_editor_freeware_windowsqy7j6.pdf
    • http://kmplitka.shop/kepusuxusu65ir7.pdf
    • https://zegosonov.weebly.com/uploads/1/3/4/1/134109065/supitajor.pdf
    • https://teribizekejuxes.weebly.com/uploads/1/3/5/3/135391999/gobefomowipefur.pdf
    • http://j3vnci4.xyz/458319756463svxt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f605864e-9ce0-40d1-af9b-4ad182ee8b39/lonadorosiwukex.pdf
    • https://uploads.strikinglycdn.com/files/774b2b92-d82b-4f09-8b42-6840b95391f5/nigub.pdf
    • https://uploads.strikinglycdn.com/files/f92264f9-fe2f-42ca-9ca2-514f5dfc6564/find_zodiac_sign_by_date_of_birth_and_time_in_tamil.pdf
    • https://uploads.strikinglycdn.com/files/decb3728-50a0-4577-93fe-b4867e216622/kanotorobudabumizifesufa.pdf
    • https://uploads.strikinglycdn.com/files/9ea3832a-86a5-4e34-8fa3-cd30d4c83cbe/2014_toyota_camry_custom_seat_covers.pdf
    • https://uploads.strikinglycdn.com/files/fbd324fd-d525-4184-a7cf-30d3854caca6/runinabasajixixag.pdf
    • https://uploads.strikinglycdn.com/files/6ca51b65-c253-42a9-9a5b-1c41b8ff1d55/waxugimowakareziredelufus.pdf
    • http://sazasewugekupej.onlinewebshop.net/wordly_wise_book_7_lesson_20.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002109b.bin
e692fc2ce6523778ff42bd8cace7dabbb184140e64883b6574e989ecb7d5fc15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2109B 5092 bytes
font_01_sfnt_off000221c7.bin
af92db0eb45533787bf37e205266a629e669b24f4a1e2f09e09273717a1cdf11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x221C7 11156 bytes
font_02_sfnt_off000247e7.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x247E7 4324 bytes

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