Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab64705ce892c578…

MALICIOUS

PDF

83.7 KB Created: 2021-03-30 16:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 70266e7798dd8f524f06e801a473694a SHA-1: 251c7c2e73744b96b5cb82b85cb11af23861c3e8 SHA-256: ab64705ce892c578fe4c0ecd830a5c440de3cdaf8ba3db2640a23aceceffd263
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to "chemistry workbook answers", which is likely a pretext to disguise malicious activity. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest it may be used to download further payloads or redirect to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/wix?keyword=chemistry+workbook+answers+chapter+7 PDF link annotation
    • https://cdn.sqhk.co/livatunozasu/oDdSpgc/new_cartoon_movies_2018_in_urdu.pdfIn PDF document text
    • https://babiweperes.weebly.com/uploads/1/3/5/3/135347107/da698b.pdfIn PDF document text
    • http://seomagnat1.online/cpm_answers_geometry_chapter_2jxhtz.pdfIn PDF document text
    • http://pixenevalir.22web.org/16712830223.pdfIn PDF document text
    • http://gazajujana.mygamesonline.org/vomosonojaxirelex.pdfIn PDF document text
    • http://espaceabone.com/5850767862xo6xm.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/83700290254.pdfIn PDF document text
    • https://tadudekum.weebly.com/uploads/1/3/5/3/135391719/f48240d365.pdfIn PDF document text
    • http://andyhongdigital.com/dc_comics_wiki_lucifer15wqm.pdfIn PDF document text
    • http://fomoregekamikat.mypressonline.com/bhu_ba_sociology_syllabus.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/376708891248984.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/c2gdLfX/58908021394.pdfIn PDF document text
    • http://fituxem.sportsontheweb.net/tokyo_ghoul_re_kaneki_comes_back.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/xegot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lixanixuzuki.rf.gd/32012009885.pdfIn PDF document text
    • http://webubekesivamuf.epizy.com/forensic_reports_dmarc.pdfIn PDF document text
    • http://jibeginogib.rf.gd/60469873285.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_e3df9bd3720b40f48653a000304323a8.pdf?index=trueIn PDF document text
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_2673209f87f24eda8675743fb4d3f948.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF324 5524 bytes
SHA-256: a2b787bb56cb41d7cd035e6de9bd8ab2c23c5876c0d968e4fb33164c4d7cca87
font_01_sfnt_off000105d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D6 11224 bytes
SHA-256: ca187b7cc842560ada91bd553e62ca816ae63377658a1fa917932e69dfea6e0f
font_02_sfnt_off00012c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9A 16080 bytes
SHA-256: 01918ab328aad74c9e8f640f01f786fd0c2e0e9f3673bd8045474dd117871356

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