Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1160e4be203836…

MALICIOUS

PDF

78.7 KB Created: 2021-03-18 02:21:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a0a791ca58037b481aa5c85c199d555a SHA-1: 4933b0b6579fd60188c9ab34afa494a37d33a4bb SHA-256: 5f1160e4be2038367a878bb0b41f8ae5f157a0dadbf74564115fa4e30d828232
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/aws?utm_term=2000+ford+ranger+3.0l+mpg'. This URL is presented within the document's body, suggesting a phishing or malware delivery attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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
  • 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.
  • 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/aws?utm_term=2000+ford+ranger+3.0l+mpg In PDF document text
    • https://cdn.sqhk.co/tibakekavero/pgeAifo/kobe_and_gigi_jordan_shoes.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/hcjdgjc/nipeninajebadunarogoz.pdfIn PDF document text
    • https://cdn.sqhk.co/baxikomo/Lpb43jg/gukunulubafufa.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/Gjggdid/ramezibinoragakopixawe.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/whbCidU/20806793512.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/cfjfJ2A/only_one_you.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/DcQNqid/52396808740.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/7a120288-4a10-42ad-85bd-5bf2e00b0255/15086369420.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/80216280664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff622e2-19f1-49d6-b6a9-6ef1f7a28ee2/mopavikufutaku.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/chain_reaction_game_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35815c25-3974-40a2-9e2c-3b7c37b16189/resenemoruleked.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/fire_department_training_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/kokafokudewipoxodarabut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1fce8a3-2bdb-4df0-86d5-7302f6ebf6b6/14086285430.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/15236931311.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/forms_of_energy_healing.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/97057943712.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/dometic_duo_therm_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/core_beliefs_worksheet_for_adults.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_off0000f3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FB 5556 bytes
SHA-256: e8bba5b8c25f6bb4030a05e6dd29fb48de10cd6428b513d1045bdb6df6ef83b7
font_01_sfnt_off000106d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D8 11388 bytes
SHA-256: 1b375d02249c9bdb59555eb5eed1ec8ca4d50b0545b1230caeae63a3aee2a54f

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