Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c76702380b2575…

MALICIOUS

PDF

80.5 KB Created: 2021-02-24 14:59:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e5304ba5dcdf2297657d0c48b0ab89da SHA-1: 22103218b87d01b8c99b95795a28eaf97c242732 SHA-256: d7c76702380b257509570b90d0bcc6933a13e608b778120f67b781b1cf175283
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable domains, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely as a phishing lure or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=oraci%25C3%25B3n+de+fe+milagrosa PDF link annotation
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/c00f79.pdfIn PDF document text
    • http://bubolikava.22web.org/anger_management_worksheets_for_tweens.pdfIn PDF document text
    • https://kusejatakobex.weebly.com/uploads/1/3/1/4/131438299/tuvuvevenotujilig.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/zajovamafapikadadab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423430/normal_6014be498473f.pdfIn PDF document text
    • https://zewurutivuzaned.weebly.com/uploads/1/3/4/8/134888434/4ac1ae77f7.pdfIn PDF document text
    • http://pujesuwidiw.22web.org/pokubumobewakukigaweliboj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5fcc55688895a.pdfIn PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/7907516.pdfIn PDF document text
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/fipawotepagarukuk.pdfIn PDF document text
    • http://pemutoguxo.66ghz.com/full_body_bodyweight_workout_program.pdfIn PDF document text
    • https://sigojexubaj.weebly.com/uploads/1/3/2/6/132682800/6426455.pdfIn PDF document text
    • http://vududodudo.22web.org/treatment_of_psychiatric_disorders.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393791/normal_5fdf0327daf1d.pdfIn PDF document text
    • https://titoboxe.weebly.com/uploads/1/3/0/8/130874676/21d91039a93942e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuperag.epizy.com/29272937561.pdfIn PDF document text
    • http://pamakejexo.epizy.com/vopepiviluta.pdfIn PDF document text
    • http://latilofu.rf.gd/derived_units_worksheet.pdfIn PDF document text
    • http://xezimid.epizy.com/sky_sports_f1_tv_guide_uk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAA 2988 bytes
SHA-256: 42e3783caedf448e14fcbc75b18e161657efc393aa677f58ca9a5bff480967cb
font_01_sfnt_off0000e65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65B 5504 bytes
SHA-256: 6472702f5ae3d34dca65534d15fb773c4ab6d1513f94d6b8e27ce7ad9deee98b
font_02_sfnt_off0000f8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 11328 bytes
SHA-256: dce77201a0968d8156a8d7b4b9453ed52e75c521fbe87af96bf2edcb51453ed1
font_03_sfnt_off00011d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5B 16164 bytes
SHA-256: 3afbc95f4a2677bf4c8b77bd7df62e4dbeb651db4b5e482cf97b58e472170d58

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