Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e3d2c3b8cf35ac…

MALICIOUS

PDF

88.3 KB Created: 2021-03-19 21:31:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 442224c24d81bbcb003a86bba30a736b SHA-1: 59cb6e0700d7bde7d314ae63c1197477e2ccb8dc SHA-256: f4e3d2c3b8cf35ac0ff92c42a3f148198374e7c0544a7e01d2f067227972c216
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, golowaki.ru, disguised with a seemingly innocuous search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into navigating to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/strik?utm_term=magic+chef+wine+cooler+error+codes PDF link annotation
    • http://jivusibofonefud.mygamesonline.org/interior_design_schools_in_abuja_nigeria.pdfIn PDF document text
    • http://ruvogodozipabiv.scienceontheweb.net/is_the_smithsonian_open_on_thanksgiving_day.pdfIn PDF document text
    • https://nupewaxupojiga.weebly.com/uploads/1/3/4/0/134042887/4132267.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/overcoming_barriers_to_communication.pdfIn PDF document text
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/4759019.pdfIn PDF document text
    • https://dotofufodil.weebly.com/uploads/1/3/5/3/135313806/xukunaxanos.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/how_to_find_the_common_ratio_of_a_geometric_sequence_calculator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gavobawum/speed_queen_dryer_heating_element_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/42246966888.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/fluke_177_meter_manual.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/soccer_coaching_for_8_year_olds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9431bbe7-12d7-4814-a62a-7394145c9f74/53882197741.pdfIn PDF document text
    • http://minivenema.atwebpages.com/how_many_quarts_of_oil_does_a_toyota_sienna_take.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/black_and_decker_toaster_oven_manual_to3250xsb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4191e625-58c5-40c9-a52a-1f3d240dfdb3/tropical_rainforest_biome_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9331ed4-f5fb-48c5-b642-cb5e61220bb8/domelunalowunemowulugi.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/wejibabawerebowirafawuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e4602d-e339-4b6c-8a9e-75ccc1f63e0e/tom_sawyers_island_disneyland_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b0a8933-a262-405f-b131-a073c0b304ea/bupitematebomikopaben.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A34 5380 bytes
SHA-256: efcde9e2c3730e9334023a7df52e6b9378817e9493a717b51f25d8ea9768239d
font_01_sfnt_off00012c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9B 11508 bytes
SHA-256: dc706a0248f68a6f96e932dca3551c7d76de843763a7346c4ec20cf26895ff3e

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