Malicious PDF — malware analysis report

Static analysis result for SHA-256 933e38fdfd6f2552…

MALICIOUS

PDF

81.6 KB Created: 2021-05-08 14:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 08bbb28101fe49331f089a3e95471747 SHA-1: 5596eec5d57838428ddf3010ee9f291ce1bfa675 SHA-256: 933e38fdfd6f25521dee0f728bd9fb96412911c60913d6ec2ef98f8bb7f51ddc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ClamAV detection confirms its malicious nature. The embedded URLs are likely used to redirect users to phishing sites or download further malicious content.

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
  • 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://maypoin.ru/strik?utm_term=tv+show+sponsorship+proposal+template PDF link annotation
    • https://renixopofofof.weebly.com/uploads/1/3/4/4/134486295/mafipaworevuvoru.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/ljffwji/47182787783.pdfIn PDF document text
    • http://whitecheat.xyz/bandbudh_aur_budbak_episode_1000z4t3t.pdfIn PDF document text
    • https://zegadakupoxak.weebly.com/uploads/1/3/4/7/134749069/371606.pdfIn PDF document text
    • https://mobofapewapo.weebly.com/uploads/1/3/5/3/135399527/6941677.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/Pfrjedx/how_to_bake_chicken_thighs_from_frozen.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwufeguv/hchbhu2/opera_browser_beta_mod_apk.pdfIn PDF document text
    • https://nirulutot.weebly.com/uploads/1/3/4/7/134700174/1043087.pdfIn PDF document text
    • https://manujemupofux.weebly.com/uploads/1/3/0/7/130738512/vowoguxim_ninawediva_fazegukuniwet.pdfIn PDF document text
    • http://wide-do.top/fifty_shades_darker_filming_locationsyji53.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/5a6cdbf4-837d-4c00-acc7-fb0400da0d0c/maths_formulas_for_class_9_algebra.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/social_media_campaign_strategy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/53957037951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617b370b-db40-4182-873f-af3c4c96b580/webitexinujatufodi.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/deformed_babies_from_radiation.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/22455044345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1daee5-7acb-47f7-8add-92eb168a19b2/20180116547.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/biwikenajubiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ffa11b6-9733-469e-9c15-5370ae4f8b34/1986_club_car_ds_gas_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/908780c5-c5f1-4641-b800-d361b5b6e032/dyson_v8_animal_cordless_stick_vacuum_attachments.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_off0000ffe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE7 5160 bytes
SHA-256: 46137d70e49963ce47fd963ea01a52243315ff3504a369ed7cf3904e038d2faf
font_01_sfnt_off0001115c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115C 11148 bytes
SHA-256: cfd00f16359b68d698cd8b3ae0a8c2fe01eb1b6f8abb15abc9f8aadafb3e236e

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