Malicious PDF — malware analysis report

Static analysis result for SHA-256 6497ced65640b687…

MALICIOUS

PDF

75.0 KB Created: 2021-02-24 18:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cfa9b27520245db0f4dd228d34ea6b45 SHA-1: bccfe2687d31ff75eb626e3e38a94236927ec193 SHA-256: 6497ced65640b68748c36434205dadfa610a048de1632fca139f0a08eb790a0b
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 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, many of which are hosted on free platforms like Weebly and S123-cdn-static.com, suggesting a coordinated effort to distribute malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

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 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://baarspo.ru/strik?utm_term=2006+bmw+330i+oil+change PDF link annotation
    • https://rerutafedebe.weebly.com/uploads/1/3/2/8/132815298/kodubaba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427523/normal_5fe4f04f93023.pdfIn PDF document text
    • http://mif-smeh.space/english_verb_tenses_worksheetpwn0n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371266/normal_5ffec3c827f6e.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/goblin_sub_espaol_descargar5m1n2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476768/normal_5fdcb4dc61f61.pdfIn PDF document text
    • http://smallita.space/17562377166erwuf.pdfIn PDF document text
    • http://tourist.fish/cmfas_m3pxzug.pdfIn PDF document text
    • https://jimuvidagonolab.weebly.com/uploads/1/3/1/6/131636746/693de92191d.pdfIn PDF document text
    • http://vostokzapad.su/jaliporofepidopalajaz5v0cb.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/rii_mini_i8_not_pairingvl3ph.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531626/normal_600faf3ae852e.pdfIn PDF document text
    • http://antonioit.fun/how_to_install_harmony_youth_booster_seate282n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368770/normal_5fddd6e71da2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490370/normal_6001e6ee7c3aa.pdfIn PDF document text
    • http://detonic-de.website/astro_tv_program_guideydyzq.pdfIn PDF document text
    • http://1yamal.space/30678498506kth8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404299/normal_5fdaea1143422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_602cd9ccecbc2.pdfIn PDF document text
    • http://starkrobotics.org/football_betting_strategy_soccervista57p0x.pdfIn PDF document text
    • https://fekoguto.weebly.com/uploads/1/3/4/4/134491689/4c16b2e.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/8370969.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE810 5668 bytes
SHA-256: 5e1ff183c3bc722b62e6c965d6e1b676f748d85500c9ad8ae82d60e46f3d2c34
font_01_sfnt_off0000fb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3F 10564 bytes
SHA-256: 340f6ec387bb0d26fc066e5367ce3bcda200a35baec93d341ba23a6eae9ffddc

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