Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf9b2fefb2f234c…

MALICIOUS

PDF

72.7 KB Created: 2021-06-03 04:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a9c4a962fbfcfdb47c00100c37d2c346 SHA-1: fb2971b71c64c23d50ef0639ffb517915c50891c SHA-256: 9cf9b2fefb2f234c2ac4bd9f76161a75472689a2299ec944a8b10860104a6959
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded links, including one pointing to 'allytemp.ru', suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references that align with the detected maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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
  • 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://allytemp.ru/pbw?utm_term=munna+michael+watch+online+hotstar PDF link annotation
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/fobopovaredorowalufi.pdfIn PDF document text
    • https://rizaxulizogi.weebly.com/uploads/1/3/4/7/134753796/5738795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_5fd9953a0bb32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455370/normal_5fda97e210bb4.pdfIn PDF document text
    • https://bunikesetula.weebly.com/uploads/1/3/0/7/130739723/448714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476768/normal_60170371827ad.pdfIn PDF document text
    • https://xolesozetenosox.weebly.com/uploads/1/3/1/0/131070434/romapav-fabase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezimin.pbworks.com/w/file/fetch/144413367/63768518767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feaf89e6-c197-4187-b246-4cd9f28d2308/how_to_clean_spectra_s1_parts.pdfIn PDF document text
    • http://dewubuk.pbworks.com/f/profit_and_loss_statement_template_free.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/alif_laila_indian_drama_full_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f613660-2daa-4c3c-b310-5468b69a38d4/peluvuzigamedazavaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1467ef-ba25-47c5-b265-bc35ba26a95c/kudeweb.pdfIn PDF document text
    • http://wudiwiligis.pbworks.com/f/1999_polaris_sportsman_500_electrical_schematic.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144414549/why_wont_my_indoor_tv_aerial_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc8f894-9f1e-4a09-a258-9629790915f1/30019408705.pdfIn PDF document text
    • http://bezawagiga.pbworks.com/w/file/fetch/144538512/wild_magic_table_10000.pdfIn PDF document text
    • http://kigemulu.pbworks.com/w/file/fetch/144537381/67047050156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1afc539e-0893-4f71-b4cf-3217b01d56f0/ledemu.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/w/file/fetch/144431757/tamilrockers_full_movie_download_tamil_2020.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_off0000dceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 5136 bytes
SHA-256: 591a440aa22ef5010d497802e9f5fddc15504340f119273a2e7faf93d38aa6bd
font_01_sfnt_off0000ee59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE59 11440 bytes
SHA-256: 27b65f96102c3a48dd50d3d0aa58ede8e40197f4266966b7fde151af69ddf3b9

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