Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9fc977f4e14c73…

MALICIOUS

PDF

79.1 KB Created: 2021-03-11 08:52:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e406949839bea1257833d17ba84c7e4 SHA-1: 88ffec86c3d49cad780b4ba36b76af29a76d2a0c SHA-256: 7e9fc977f4e14c7399b68ff71c5003d22824837fcf314ea407b5d5af0e375805
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with several pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious sites. The document body appears to be malformed or obfuscated, preventing a clear understanding of its lure, but the overall structure and URL distribution strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9549

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/award?keyword=ata+spec+2020+chapter+9+pdf
    • http://bosemefawixuwov.mypressonline.com/the_boy_in_the_striped_pyjamas_review_film.pdf
    • https://cdn-cms.f-static.net/uploads/4386842/normal_604668ce5b07a.pdf
    • https://static.s123-cdn-static.com/uploads/4415073/normal_5fe0bdeb5d90f.pdf
    • http://lufesemi.iblogger.org/77425991546.pdf
    • https://lijimoxa.weebly.com/uploads/1/3/0/9/130969704/0715b33c1347.pdf
    • http://nedopivele.22web.org/pobowonalodaxalanimob.pdf
    • https://dewifekezag.weebly.com/uploads/1/3/5/3/135313931/9545a66724.pdf
    • http://warixedivukinat.mygamesonline.org/introduction_to_data_science_rafael_a._irizarry_solutions.pdf
    • https://modefijibig.weebly.com/uploads/1/3/6/0/136011483/vowomafebozes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bebovufuvuji.myartsonline.com/xelizekamoferefik.pdf
    • https://uploads.strikinglycdn.com/files/e46cb932-5412-4c6a-9d13-f6db3bce1157/5725465604.pdf
    • https://uploads.strikinglycdn.com/files/7a7964e2-fa9e-4e38-8a6a-320fe422eb0f/14792021882.pdf
    • https://s3.amazonaws.com/sevoga/benhurst_school_uniform.pdf
    • https://uploads.strikinglycdn.com/files/cec0f6a1-9b3c-401a-a360-10a371151ce9/93183093990.pdf
    • http://vorisenunajix.myartsonline.com/the_city_and_the_city_book_review.pdf
    • https://s3.amazonaws.com/pegebunov/59010400666.pdf
    • http://puwojewemuxa.epizy.com/48906146149.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e1e.bin
0bcf80ab95b48b3f162145f747f4936ffbc00a6aac03ad36403aa99f83ff14ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1E 5628 bytes

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