Malicious PDF — malware analysis report

Static analysis result for SHA-256 08af8456a8f203d5…

MALICIOUS

PDF

75.6 KB Created: 2021-04-04 22:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92b543615b67d9f7a22b433fd20bcbd9 SHA-1: 6246820b4718d860061a74791325afca5bf30c7e SHA-256: 08af8456a8f203d51f8a160acbcb000de13b869fd0f4c4d0f3d553e20ac0d1e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or phishing attempt. The primary URL identified is 'https://ponafet.ru/aws?utm_term=honda+small+engine+repair+shop+near+me', which is likely part of the malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/aws?utm_term=honda+small+engine+repair+shop+near+me
    • http://junebojano.iblogger.org/47756235343.pdf
    • https://nijikubu.weebly.com/uploads/1/3/5/3/135347783/xikivaku-babajalife-laxod-monawolomutum.pdf
    • http://diziretojiz.iblogger.org/12461246674.pdf
    • http://wavoximebipota.iblogger.org/56335333795.pdf
    • http://nomokosu.iblogger.org/coreldraw_x6_windows_10.pdf
    • https://static.s123-cdn-static.com/uploads/4414487/normal_60085c1f94d76.pdf
    • https://sozuleku.weebly.com/uploads/1/3/5/9/135962343/wogifujufute.pdf
    • https://cdn.sqhk.co/simumufij/hfuhcdk/bluetooth_controlled_car_using_arduino_project_report.pdf
    • https://fopizute.weebly.com/uploads/1/3/4/3/134315067/6373421.pdf
    • https://xotizirew.weebly.com/uploads/1/3/1/8/131855992/be747b.pdf
    • https://mobajexiv.weebly.com/uploads/1/3/4/4/134455683/1015133.pdf
    • https://cdn-cms.f-static.net/uploads/4370269/normal_6044a7347c502.pdf
    • https://cdn.sqhk.co/dojaxeje/6jcTHib/51844376640.pdf
    • https://cdn-cms.f-static.net/uploads/4490141/normal_60379d6f20518.pdf
    • https://cdn-cms.f-static.net/uploads/4482631/normal_60286723eae38.pdf
    • https://cdn-cms.f-static.net/uploads/4443344/normal_603edb197ea91.pdf
    • http://javatow.22web.org/turnitin_plagiarism_detector_free.pdf
    • https://cdn.sqhk.co/rugofufol/Z6iiHhh/best_ninja_air_fryer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://davafegi.epizy.com/cyrillic_cheat_sheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb6d.bin
cbefa07cc9234d884b41c6858a30f15eeb5af9c22183c9bbfb926b3920860ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 5332 bytes
font_01_sfnt_off0000fd5c.bin
889fc4d3e69df1f945321e451523b6a9bae5e128416fbdff4802b9b0eeab41df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5C 10448 bytes

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