Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fb2b7da3144f89…

MALICIOUS

PDF

79.1 KB Created: 2021-03-02 21:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7537eaa7b3a3c1597882048badae4b85 SHA-1: a84fc2aa1ef7b5013ed51afcec7fa743e8e521a4 SHA-256: a4fb2b7da3144f896da33e558e35147d469f4c1b44cd8a992846613481f13605
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to a malicious website, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=epson+smart+board+projector+manual PDF link annotation
    • https://dowusasetitemej.weebly.com/uploads/1/3/4/3/134307927/duwugiwofun.pdfIn PDF document text
    • http://yourdesk.website/67340560110fjluu.pdfIn PDF document text
    • http://misstourist.info/14426739406gbezd.pdfIn PDF document text
    • http://fufejezonodim.mywebcommunity.org/dokaz.pdfIn PDF document text
    • http://sukuwodexi.scienceontheweb.net/rademacher_topics_in_analytic_number_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/XC3ie6U/free_live_sports_tv_streaming_sites.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/gg4jhjf/76414362528.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/wanifalomazerojovebi.pdfIn PDF document text
    • https://duxojavuse.weebly.com/uploads/1/3/1/4/131483254/c9d0d4442547a.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/58677021479.pdfIn PDF document text
    • https://tomavibevojivow.weebly.com/uploads/1/3/4/0/134016690/38dc9.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/kitasafowejilunenimar.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/lisoxikudorepamodetijuli.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/xebaxaximowobux.pdfIn PDF document text
    • https://kufobuzu.weebly.com/uploads/1/3/5/3/135330794/degusola.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/would_an_evap_line_be_blue.pdfIn PDF document text
    • https://cdn.sqhk.co/sisuriwul/jeigFj6/baking_recipes_easy_no_egg.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/PF5hgjc/42091284789.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://pusapovewazigu.onlinewebshop.net/pebojawov.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_off0000ebe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE5 5228 bytes
SHA-256: e543caf4a2476aa57d69a4a23b1b005e1648ac1e7e113f6249c90c07f878ae6a
font_01_sfnt_off0000fd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8A 10476 bytes
SHA-256: 2ecce45a058dfceca2e0f00ab0f8ef8de1460830052cdf426b52f2495d778c1e
font_02_sfnt_off000120ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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