Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc37b9a08f8a2a47…

MALICIOUS

PDF

72.2 KB Created: 2021-05-31 06:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5d974b9cba1b8fd8f75972cf3ad00d41 SHA-1: 2df7cb32b65b96dba6c557f85d1ea4ce1b02c556 SHA-256: fc37b9a08f8a2a470d92ccccd0d50a1aa2b0ca13015e1a3cd1ab871fc161fcae
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=john+deere+54+mower+deck+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5fd79f34efed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484818/normal_602790cddcb3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_606b769d7c2eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_60433589ebf91.pdfIn PDF document text
    • https://lurumafija.weebly.com/uploads/1/3/0/8/130873973/lenovaburopoled.pdfIn PDF document text
    • https://donobemibuv.weebly.com/uploads/1/3/4/5/134512533/3baea34d67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_601980346cbe1.pdfIn PDF document text
    • https://kuxesilivalagi.weebly.com/uploads/1/3/5/9/135963561/f4229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409616/normal_5fe738257a6f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422368/normal_5ff39bd984a31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451217/normal_601f57ee7ffdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491173/normal_606970361c401.pdfIn PDF document text
    • https://domemasajexal.weebly.com/uploads/1/3/5/3/135304114/5789137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5fe89019aa3cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491410/normal_6031ada6310ff.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/2f997fc1-3a62-4fa0-a480-ded17999e94f/why_schedule_on_doordash.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b24cbdf-66e1-43e0-a76a-1283822ef9c7/vopafagotoxavaxevurujat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/750e1caf-ef49-4805-82e4-05d7a7b695fc/echo_srm-2100_trimmer_head.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b98b2bc-38f3-4051-8ea5-9a9c2258391a/onn_wireless_bluetooth_mouse_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e272e40a-35e1-456f-8423-a77ffb77ad09/zanezabagaxifumamutekoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7353927f-2922-4294-a587-707544673e11/how_to_make_your_apple_watch_series_1_waterproof.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_off0000df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF08 5356 bytes
SHA-256: c4da5daebb542f0714ad7f270a73e4c19aa73ebcd436a05afb252d49a9014bd0
font_01_sfnt_off0000f12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12D 10072 bytes
SHA-256: 585a23607fcef4c5480288c4487a7bbd59e39447294e87eb1e043c5d93492571

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