Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1b5da5e325d05d…

MALICIOUS

PDF

86.1 KB Created: 2021-04-01 07:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9d4ccfc356e5c5181a1e0a161eeba6d6 SHA-1: b4510be3a34a44e4044dc3404ace1e3d7770770f SHA-256: fd1b5da5e325d05dc558db201869d5dac4cdf50e3e56f98217674124f4567c60
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/strik?utm_term=fender+mustang+ii+amp+specs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4502906/normal_5fed3a8cbd50c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368956/normal_5fc688ac5633c.pdfIn PDF document text
    • http://nariwunuzaw.scienceontheweb.net/duwogumubuwuvitapisamegut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_604cba334c638.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/89296202075.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/xinazik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_600f9e395e411.pdfIn PDF document text
    • http://foguwefo.iblogger.org/4337375652.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/a0cea981-41af-4d7a-845e-3b7abfd1fca5/is_there_any_sugar_in_soda_water.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/complete_list_of_nicholas_sparks_books_in_order.pdfIn PDF document text
    • http://wudobez.rf.gd/bass_guitar_strings_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87661414-ba3d-4445-a6dd-9ae49879c9f9/jorez.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/24927899374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da29da6-1b8f-42f0-bf27-959a939c865e/how_to_convert_audio_files_to_midi_logic_pro_x.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/sizemedabaleto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bfc3218-9603-4ffd-bcc5-b2b05557e01d/domav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9954fde8-8eb8-4426-b7b9-06ea154e0330/moxakudolekamup.pdfIn PDF document text
    • http://fupofew.epizy.com/acunetix_manual_tools_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071514ad-b822-4322-8b82-f346a72ef07e/dyson_v8_animal_cordless_vacuum_cleaner_sale.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 5088 bytes
SHA-256: 42fc798215063700b17288657e66092abe332c340d15d9f3a011b4fc34b3c566
font_01_sfnt_off000101eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EB 10804 bytes
SHA-256: 58dd9121034742b942b1c63b488385a132396c06888c131bdafd17c2c3f08fe2
font_02_sfnt_off00012720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12720 16304 bytes
SHA-256: 440b159d14de00d868b99d07762b2ca59c30c403935a56db5d29518140bfea0c
font_03_sfnt_off00013c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C95 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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