Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3fcc26a81d150d…

MALICIOUS

PDF

77.5 KB Created: 2021-05-19 16:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2e17c37276b15785e5caf9c36b8669aa SHA-1: cfd31e636ed3628cd26c2d97225fc5fe97bbf66e SHA-256: 3a3fcc26a81d150d940c2529086820caf42d6d8002e487a5981d10e96209d096
176 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. The presence of numerous external links, including one to 'ponafet.ru', suggests an attempt to direct users to malicious or deceptive content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://ponafet.ru/strik?utm_term=writerbay+plagiarism+quiz+answers PDF link annotation
    • https://duludogom.weebly.com/uploads/1/3/4/6/134673238/wubow_samabedigef_jujiwub_poxof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472182/normal_603a76a63b575.pdfIn PDF document text
    • https://bemezonef.weebly.com/uploads/1/3/5/3/135389856/dadujerapuxa_tazaz_ruxuw_fadefusan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452381/normal_5fd75f3dcbe28.pdfIn PDF document text
    • https://vobijiwemifi.weebly.com/uploads/1/3/4/6/134673224/mosibo.pdfIn PDF document text
    • https://fusorebumobem.weebly.com/uploads/1/3/3/9/133986296/fegerabokofufediwam.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/af5de5df-8649-426e-827d-dc5671095152/how_to_program_a_universal_remote_magnavox.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/transylvanian_sunrise_cz.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/78616377974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9dd6aa9-c4cc-4281-86d1-b057e447a8f6/eddie_bauer_stroller_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4de4fd35-e780-445e-bfdc-8d3dc650ac06/diwam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d3fe9f-7394-4292-8ff7-12d0d3ca5955/how_many_calories_in_a_large_powerade_drink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a9297d-6849-4211-888d-250522990575/remains_of_the_day_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd69a6f-0157-4593-9940-0c70bdd8995f/berserk_manga_deluxe.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/51749679677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90972ce4-85c9-4343-827b-adff6abfd441/sotavidojojokazakivibefot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbf50b84-ebaa-4d81-ae04-74ca2dc087d7/sodastream_fizzi_sparkling_water_maker_-_white_rose_gold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332bac26-f913-4a33-acc3-4c56424a705e/57108406839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929dc9b6-4a5e-4dc4-8f3c-5c051e8888af/how_to_charge_phone_with_aa_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f4d1d6-5eab-48e3-b890-ce8c104c4991/george_foreman_grill_cooking_time_for_chicken_breasts.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD891 5664 bytes
SHA-256: 5b84b06793a56b41cee17e29027da7e9584ec83426d1ac69cf2bc45f3b60da35
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 10616 bytes
SHA-256: 8c6f9e78c46f5a2b3417ae94e15ebbac8c703a8dedb6b176bb7b78fb9bb0294c
font_02_sfnt_off00011086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11086 16424 bytes
SHA-256: 88be9aa2ee0ffeac00c4341b34637012939167bc9dacde9640fecbc6a9cd32ae