Malicious PDF — malware analysis report

Static analysis result for SHA-256 376ffb90002bf09b…

MALICIOUS

PDF

100.4 KB Created: 2021-05-10 19:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c573150db1a228415639e93e6d468773 SHA-1: 206836098fa3a1b7c3b58bf044fc26e48969f023 SHA-256: 376ffb90002bf09bb3a1590ce5d31ffc02e71a00dd4f47a7a26cbaa4dc5ea790
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. The embedded document body, though heavily obfuscated, contains text related to 'Blue piebald dachshund for sale' and references the authoring application 'wkhtmltopdf', suggesting a lure. The presence of multiple unknown and potentially malicious URLs, including one that appears to be a phishing or malware distribution endpoint, strongly indicates a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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=blue+piebald+dachshund+for+sale PDF link annotation
    • http://lokuvowegibo.iblogger.org/xasobuzavekotol.pdfIn PDF document text
    • http://navewezaninub.iblogger.org/barrington_sports_hockey_stick_guide.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://s3.amazonaws.com/sefukirexuwekij/21574698122.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/whatsapp_2018_free_for_android.pdfIn PDF document text
    • http://zenulasomizin.epizy.com/afrodisiak_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/retofafuvozaxosafuvabi.pdfIn PDF document text
    • http://wiwekire.epizy.com/77628600742.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/bangalore_airport_departure_information.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/jutoxupalafijakiziz.pdfIn PDF document text
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_15d95965aeca446f9b3603d2a5577544.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/whirlpool_dishwasher_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/best_self-cleaning_litter_box_consumer_reports.pdfIn PDF document text
    • http://vowukexakajan.rf.gd/precalculus_textbook_demana.pdfIn PDF document text
    • http://tivogowajap.epizy.com/86697527174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f97f81-9da1-4cec-9ac4-7b6131e78358/punorerekatekapoza.pdfIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_0266104c9512462c8d01948acc68c230.pdf?index=trueIn PDF document text
    • http://nowaginog.epizy.com/bobble_keyboard_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/sijikuvimajapif.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/laxijadatowab.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/how_to_get_into_us_army_sniper_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702b4bc7-9422-4953-95ca-d04ed428d293/24813196305.pdfIn PDF document text
    • http://pejuxex.rf.gd/asian_paints_products_list.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000139db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DB 5236 bytes
SHA-256: a975ffb7ce3c399cb2fd4d832639812257f87728fc401c63e01e10e7ecebfcc0
font_01_sfnt_off00014b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B81 12764 bytes
SHA-256: 72b78a5296bb992627abcdd94d5eb43b8d8e5dfa8fa89c7f987db6826f1c51d4
font_02_sfnt_off000175dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175DC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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