Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc73946e628aa78…

MALICIOUS

PDF

75.6 KB Created: 2021-05-15 13:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b3461e54d4604634dbff5778840373e4 SHA-1: f60a2195c29e068ec37a8e8f18b40cfcd73a8ee9 SHA-256: 8cc73946e628aa789cbc3bff87e148a1419b892b51fcf2248f2f14e2bda087fe
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

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://mezovuduw.ru/strik?utm_term=the+enemy+series+charlie+higson+movie PDF link annotation
    • https://barijimuje.weebly.com/uploads/1/3/1/4/131406344/zigesuxukediruwonepa.pdfIn PDF document text
    • https://nosozekime.weebly.com/uploads/1/3/4/6/134634018/a298796bcb74.pdfIn PDF document text
    • http://rixanemusijod.mywebcommunity.org/balance_chemical_equations_worksheet_with_answers.pdfIn PDF document text
    • http://xeniveperovabef.sportsontheweb.net/13784619283.pdfIn PDF document text
    • https://fulotagefopag.weebly.com/uploads/1/3/1/8/131857199/b31399211fdcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_605dd2b2d2d29.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/15282502121.pdfIn PDF document text
    • http://pinopizo.sportsontheweb.net/como_iniciar_un_taller_de_mecanica_automotriz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500447/normal_60376019f28a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445107/normal_5fe7b6a7574ad.pdfIn PDF document text
    • https://fusavufotopos.weebly.com/uploads/1/3/4/6/134634064/lixaditalu-besif-tewovonelobiro-kipixalokipeva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426063/normal_5fe5893dbdb3a.pdfIn PDF document text
    • http://xunetokawetik.sportsontheweb.net/besapodatelaro.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://muwadobekele.rf.gd/pocket_juice_wireless_charger_best_buy.pdfIn PDF document text
    • http://pejinubonuxus.epizy.com/5252460314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a356e92-2eb6-44e7-954e-25b37870a73a/21319923721.pdfIn PDF document text
    • http://pebenuxotuk.epizy.com/49872678381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70779ad3-7bb5-4017-bc7f-19c7ff98eacd/21790360351.pdfIn PDF document text
    • http://sumafalonedap.rf.gd/tajesirumuli.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/35911590549.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/nuloxo.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_off0000dc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9D 5032 bytes
SHA-256: 51b64afa691b0dfee703f12f8bbdbb2ce34fb1327e6705d4b4dfa8d310723bba
font_01_sfnt_off0000ed78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED78 10476 bytes
SHA-256: e13b3f199ddb78332246aa3e0e5d47d8f195c7965b199f00fee6bbeff47c9b99
font_02_sfnt_off0001114b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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