Malicious PDF — malware analysis report

Static analysis result for SHA-256 497ff5c18fdf619a…

MALICIOUS

PDF

76.3 KB Created: 2021-04-18 12:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1955a14b72d8ffbea85174cda6636cbc SHA-1: ccf75d8d0495d0502bcc127fb0c38535a9736e91 SHA-256: 497ff5c18fdf619a3e2bf99e10d38323af0ea5bd3e19f26ffb2ab1b11c4afe82
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'baarspo.ru', which is likely part of a malicious campaign. The document body, though heavily obfuscated, suggests a lure related to a 'Kenmore gas stove service manual', aiming to trick users into clicking the malicious link.

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://baarspo.ru/strik?utm_term=kenmore+gas+stove+service+manual PDF link annotation
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/8e5919b7a47b72c.pdfIn PDF document text
    • http://dress-russia.ru/3995283249661uag.pdfIn PDF document text
    • https://gizomedapirev.weebly.com/uploads/1/3/1/4/131454265/1663490.pdfIn PDF document text
    • https://filukekab.weebly.com/uploads/1/3/4/4/134478490/8293948.pdfIn PDF document text
    • https://tejifogigevavep.weebly.com/uploads/1/3/4/6/134675995/8d1f253385.pdfIn PDF document text
    • http://operationhomeplate.com/how_do_i_fix_my_oven_control_paneloip8t.pdfIn PDF document text
    • https://kimivatebuxokas.weebly.com/uploads/1/3/4/7/134702804/9076696.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/8ce17db7-c242-4769-aeab-c5453193d31f/how_do_you_make_burger_king_zesty_sauce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe9f14e-fd40-464e-afba-2c75af581a18/food_calorie_counter_chart_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8c1f28-10dc-4560-bef4-6f66f8fb6e1e/97979328068.pdfIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_ab4f1778a8da4f91b63173493678bb0d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/047f6e98-d424-486b-ad45-44db4d57fad0/are_all_captain_underpants_books_in_full_color.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1962594-8c5c-42d9-a16a-dece8b3295de/1356681204.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_2979bb18b9b941cb9d569635ea3faf8e.pdf?index=trueIn PDF document text
    • http://gerekuvuburase.epizy.com/shell_shocked_ww1_worksheet_answers.pdfIn PDF document text
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_a595e8468fa346299e9db5cb921fc071.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4026af-c4ab-4594-b342-13e379f75b2a/33990799745.pdfIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_abdde6d8fb71443eada3e881dee0962d.pdf?index=trueIn PDF document text
    • http://rilenipavow.rf.gd/kogozamonopufomelima.pdfIn PDF document text
    • http://juvoganale.rf.gd/33083181519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0604506d-0752-4f1a-8168-39b5015dd4f1/1996_jeep_cherokee_transmission_problems.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_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 5148 bytes
SHA-256: 3adf1bc27abb1cea2ec618f1bbe5e143c08e7a6a77e6de88c70e561ca5a2e1d5
font_01_sfnt_off0000fe18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE18 10952 bytes
SHA-256: 5e5b909fc97bb9440e9a479d49674f0a2a45d0c84c013562366c777efcb057ef

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