Malicious PDF — malware analysis report

Static analysis result for SHA-256 68df38f8545fb586…

MALICIOUS

PDF

72.3 KB Created: 2021-05-25 12:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cf905747c2c5e2a4c9267a3d8cf0b181 SHA-1: 69950b16cfc0c0560392a7881cff44b51e41f032 SHA-256: 68df38f8545fb58680929af24e9e812ffb1a05ca0f9bee06d439e06cf00651ae
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a redirector link to 'https://yafferge.ru/strik?utm_term=manuale+istruzioni+italiano+garmin+gps+12xl'. Another heuristic indicates a PDF link farm, suggesting a broad attempt to distribute malicious content. The ML classifier and ClamAV detection strongly support a malicious classification, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=manuale+istruzioni+italiano+garmin+gps+12xl In PDF document text
    • https://cdn-cms.f-static.net/uploads/4496380/normal_603fd9e3d0465.pdfIn PDF document text
    • https://xadiditenir.weebly.com/uploads/1/3/4/7/134763486/31e1b3a4631c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_5fd9c84ca9939.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/ecb7839842866.pdfIn PDF document text
    • https://sidomepavoresob.weebly.com/uploads/1/3/5/3/135322675/394b15306a8c580.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/bd9aac5b-3871-473f-984a-890e78497af8/power_washer_pump_oil_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b7a3470-e413-4bee-8ab6-e169153bc593/garmin_920xt_resetear.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/dogapaxumotowafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa76f280-45f5-4e47-8e79-f73df1ab981a/how_to_write_memoir_sentences.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022c3059-e1b9-4f40-8fb0-167620335b24/kemajatizobuz.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/timeline_of_david_attenboroughs_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/279e68f6-e917-4fdd-b3e9-e56171ccd1af/bosch_ask_the_dust_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c82d8b35-61e9-4c70-b5e6-7dbd35a8baf5/d_link_dir_868l_change_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5d82eb-aab0-4499-958a-54d58d7a5615/ejercicios_de_adjetivos_y_adverbios_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd7a542-1944-4319-b593-6255cdd9ca0c/car_dealership_business_plan_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431d532a-5089-43b8-93a9-51fcd783cfa3/20044718546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944a05d7-1a9a-473d-b75f-56c7715608a6/luresoxotilepirovivamal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1874fcb4-b90f-412c-988f-de69e841e01b/los_voceros_de_cristo_mp3_escuchar.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_off0000db95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB95 5444 bytes
SHA-256: 97cfcc252355c2d213fc428be92000e09398e7ddd7e59c1edca687016fd8e350
font_01_sfnt_off0000ee29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 11448 bytes
SHA-256: 1096dcebcd818d7241caeaef4cf1a08eff3d56357f06970c400a647bd6790e3a

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