Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dde571c2cfb6b67…

MALICIOUS

PDF

87.7 KB Created: 2021-03-23 22:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 061881837c4cb26cd3f285fa2360770f SHA-1: 9211fb1c90b1f59b6ee7b51dadb2dc28d6085bf5 SHA-256: 7dde571c2cfb6b678071974e54943c30cfa4d1cc999c37bbd360a724c28b676a
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 a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains metadata related to PDF generation, indicating it was likely created programmatically to host these links.

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://leonvi.ru/wix?keyword=four+major+physical+features+of+northern+europe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454289/normal_6014330065a69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_6057dfcec5e05.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/LkRflhf/download_game_rayman_jungle_run_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/ifwhhSE/pafesev.pdfIn PDF document text
    • http://rojenugilin.22web.org/lasagna_sheets_vegan.pdfIn PDF document text
    • http://mebets.xyz/types_of_fiber_optic_cable_connectors4tj8b.pdfIn PDF document text
    • https://pisukobuvasojab.weebly.com/uploads/1/3/4/3/134398412/957823.pdfIn PDF document text
    • http://bbcua.site/1008_names_of_lord_vishnu_in_tamiltnikf.pdfIn PDF document text
    • https://fusonunobowur.weebly.com/uploads/1/3/0/8/130813531/bazujutividoraz.pdfIn PDF document text
    • https://tenigirexono.weebly.com/uploads/1/3/4/6/134645883/rozopikikazit.pdfIn PDF document text
    • http://zejazan.iblogger.org/what_are_some_examples_just_laws_of_exponents.pdfIn PDF document text
    • http://hot-money.fun/223280190666kav9.pdfIn PDF document text
    • https://zilibadokaji.weebly.com/uploads/1/3/2/6/132680781/6541370.pdfIn PDF document text
    • http://ndfnasg.xyz/xajopelugizidoduwujakoljzdmm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492536/normal_60501f1094b77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_1d308f0502b64fa5a5e467f86a09e3ad.pdf?index=trueIn PDF document text
    • http://temidegizesoweg.rf.gd/xujaniwagep.pdfIn PDF document text
    • http://dufovufozotetan.epizy.com/woporuxesixapodom.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_bee0489d497a47068f88ad0cb0155957.pdf?index=trueIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_f467b00b808a4236a95ed8048f14323c.pdf?index=trueIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_40efd7eedd254abfaffe95b6d2ce82ff.pdf?index=trueIn PDF document text
    • http://rupawuvafe.rf.gd/mecanismo_de_ao_da_acetilcolina.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_off000110f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F3 5388 bytes
SHA-256: 989979039fd32afd34f784e0d2fb00cc97f1c3b884bf56af09f9436d98651939
font_01_sfnt_off0001232a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232A 15320 bytes
SHA-256: ff568ddea69fddbdc8f511b9155fb4425f46dfad8a82c2302a28eb942dc81985

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