Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed40b482185479b…

MALICIOUS

PDF

87.3 KB Created: 2021-03-16 02:15:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 20262f3bd11eef2dc61e964a4f2adfd9 SHA-1: 2460651a2ebbe4788f0f6128c3b39dc5d43b968c SHA-256: 7ed40b482185479b8b99aff5cb84546f59a30940e93ff8cb6ca187230564ad39
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 multiple embedded URLs, including one that appears to be a redirector with UTM parameters, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains fragments that hint at search result or manual content, aligning with a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=honeywell+lynx+touch+manual+espa%25C3%25B1ol PDF link annotation
    • http://tuvivukaroj.mygamesonline.org/latest_oracle_pl_sql_developer_jobs_in_bangalore.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/why_is_my_nespresso_blinking_red.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409393/normal_60115fc0b0887.pdfIn PDF document text
    • https://bufibetotireguk.weebly.com/uploads/1/3/0/7/130739935/d356eac7e636d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460255/normal_5fd93cbf715f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_60277d3bda353.pdfIn PDF document text
    • https://kefozonijufan.weebly.com/uploads/1/3/4/6/134689321/texemis-nusaz.pdfIn PDF document text
    • https://vijapuloxo.weebly.com/uploads/1/3/0/7/130775263/9839808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_5fe7d7a0baa81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_604ab66aaa856.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_1dd9d02d2b2d409fa718eefba8f5b6d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/792410d8-dc0c-44c7-97ca-e210d490e372/24220828947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3149dab-0103-4b88-9515-7656855956b2/zepufidarobuvula.pdfIn PDF document text
    • https://4e4608fd-868e-43f5-b6ba-14e5e4b50785.filesusr.com/ugd/b1f235_64dd19e5d50a45aa949d2ccf3142612b.pdf?index=trueIn PDF document text
    • https://c9107794-7b31-4e5c-84de-5db174abdfaa.filesusr.com/ugd/aabf5f_88889b52c92442daaed3086b9f9b3f52.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC6 2028 bytes
SHA-256: c612ad12d1397d1e0458c46510ee8f8a91df26a8a07063b0765957167049ea4f
font_01_sfnt_off00011472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11472 5512 bytes
SHA-256: 739c9c7eb5b2939863f5627d524d5139481598495aa8632e95a56959e10330d9
font_02_sfnt_off000126de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DE 11292 bytes
SHA-256: 17d92318f402420fb11b58edcfa618c4e13fb7bfa2295d53ecc2c57b9573ac51

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