Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a58e2296a2c86d2…

MALICIOUS

PDF

69.7 KB Created: 2021-06-13 00:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9871caa7143136b7073c391d7f3da5e8 SHA-1: 58c9c59141418fe14f8a8156613abe25507ef245 SHA-256: 7a58e2296a2c86d226ceb5c140c6694fdb760a1fa56eb5c1c7f4dc091c329ab3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting services and employing UTM parameters, suggesting a link farm designed to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this being a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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
  • 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://pixomot.ru/pbw?utm_term=sura+guide+for+9th+pdf PDF link annotation
    • https://monirazosakazux.weebly.com/uploads/1/3/5/3/135316997/diwewinamub_xagipimug.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/melakedorusatubur.pdfIn PDF document text
    • https://raputaluwim.weebly.com/uploads/1/3/1/6/131606275/dabokalovorezi.pdfIn PDF document text
    • https://lupofavegevo.weebly.com/uploads/1/3/5/3/135335207/b39d949f6e25dce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://redelaw.pbworks.com/w/file/fetch/144535962/41465373347.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/w/file/fetch/144654186/90838707130.pdfIn PDF document text
    • http://didaneguk.pbworks.com/f/liam_neeson_anchorman_2.pdfIn PDF document text
    • http://lulimogosan.pbworks.com/f/zegojefav.pdfIn PDF document text
    • http://najajufuf.pbworks.com/w/file/fetch/144948858/wolaninebujovizuvafo.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/f/44201701719.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/w/file/fetch/144478125/super_mechs_hacked_unlimited_money_and_tokens_apk.pdfIn PDF document text
    • http://gorixose.pbworks.com/w/file/fetch/144605907/xekoburaj.pdfIn PDF document text
    • http://panuduxeruv.pbworks.com/f/1320493117.pdfIn PDF document text
    • http://tagexoba.pbworks.com/w/file/fetch/144758853/zatatowuvexasotafe.pdfIn PDF document text
    • http://finebov.pbworks.com/w/file/fetch/144445200/chi-square_test_example_problems_with_answers.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/f/67611536842.pdfIn PDF document text
    • http://jilawuxifi.pbworks.com/w/file/fetch/144620100/lejelozapu.pdfIn PDF document text
    • http://vibasuvezuz.pbworks.com/w/file/fetch/144493332/free_download_mp3_koes_plus_kembali_ke_jakarta.pdfIn PDF document text
    • http://lokiboz.pbworks.com/f/limaxeb.pdfIn PDF document text
    • http://jozeluwofe.pbworks.com/w/file/fetch/145212906/mosesufezaruxesupe.pdfIn PDF document text
    • http://fepewuwakow.pbworks.com/f/femivurukibogidowenepozi.pdfIn PDF document text
    • http://voluluzij.pbworks.com/f/spirit_controlled_temperament_free_download.pdfIn PDF document text
    • http://sinorodolu.pbworks.com/f/45245750683.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77A 5128 bytes
SHA-256: 1364356740dc3afa04909119f35db45c7cea658cbcdfc3307e83d2e98448ce04
font_01_sfnt_off0000d903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD903 10148 bytes
SHA-256: 5256821982a4edc7f7a677058cda11b4fd209787c9f001bc503bb8ae1a37824d
font_02_sfnt_off0000fbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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