Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece8f0f85f186a47…

MALICIOUS

PDF

71.9 KB Created: 2021-06-06 00:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e0b60768e354479093fb29611934df6 SHA-1: 505fada7ba46140ffd3f642db865ae1af1964c71 SHA-256: ece8f0f85f186a47ceb821942a636c5af8b81e10210e7c9dec58ec33d2b1f262
176 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, designed to redirect users to various websites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically a phishing or trojan distribution campaign. While no scripts were directly extracted, the PDF structure and numerous external links suggest an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://cructi.ru/pbw?utm_term=is+the+swann+app+free
    • https://denumojadiribik.weebly.com/uploads/1/3/4/0/134042792/gudufasudakavub.pdf
    • https://kedixusivazusug.weebly.com/uploads/1/3/4/8/134869684/8837131.pdf
    • https://cdn-cms.f-static.net/uploads/4385859/normal_60404728d16f3.pdf
    • https://cdn-cms.f-static.net/uploads/4410983/normal_6044cd3e09e2e.pdf
    • https://static.s123-cdn-static-d.com/uploads/4471096/normal_60afef1f80e1c.pdf
    • https://static.s123-cdn-static-d.com/uploads/4459180/normal_60b6aed748b46.pdf
    • https://cdn-cms.f-static.net/uploads/4446168/normal_600decf14fb7c.pdf
    • https://cdn-cms.f-static.net/uploads/4488116/normal_60157a458772d.pdf
    • https://cdn-cms.f-static.net/uploads/4459324/normal_605c47ef3e033.pdf
    • https://cdn-cms.f-static.net/uploads/4393026/normal_6058c687172ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144427092/iobit_driver_booster_6.5_key.pdf
    • http://kimotamiju.pbworks.com/w/file/fetch/144528135/67566431652.pdf
    • http://jutopar.pbworks.com/w/file/fetch/144540642/stoichiometry_word_problems_worksheet_answers.pdf
    • http://lopofemusun.pbworks.com/f/how_apply_for_ehsaas_scholarship.pdf
    • http://vaporezikumu.pbworks.com/w/file/fetch/144586299/how_to_memorize_tarot_card_meanings.pdf
    • http://zemenifinabe.pbworks.com/w/file/fetch/144686661/45730546827.pdf
    • http://labidan.pbworks.com/w/file/fetch/144471720/9643319542.pdf
    • http://fulusivijomu.pbworks.com/w/file/fetch/144451434/10104884749.pdf
    • http://tukufidanega.pbworks.com/f/tavewoliwegapewakatupin.pdf
    • http://mepijewaj.pbworks.com/w/file/fetch/144625509/77205688815.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_off0000d936.bin
5289a2660b5ab7cb174abca0fdf891d1620faaab9a78493b0938e871be171e69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD936 4984 bytes
font_01_sfnt_off0000ea39.bin
814ae88775917430dc2dea9ca1772975a3c9b79aaa2645b8d7a0118b4462fe7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA39 11876 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.