Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde92438765adb60…

MALICIOUS

PDF

68.4 KB Created: 2021-03-03 01:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1adb4caff29e95bab5a716cd8e2192e9 SHA-1: 12a29ed509bfb8d2d0bd738208ec730d70bd24c0 SHA-256: bde92438765adb605b9a22aec0bfb0ec29d68f0c72507b5ed515b17040b06d8a
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a redirector to known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wb?keyword=soundlogic%20xt%20keyboard%20how%20to%20turn%20on%20lights In PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/nRjdjaI/subway_santa_runner_surfers_endless.pdfIn PDF document text
    • http://ropisunofo.mygamesonline.org/vanevob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392860/normal_5fdb2fb855b71.pdfIn PDF document text
    • http://alphabitx.com/634327697863wag2.pdfIn PDF document text
    • https://cdn.sqhk.co/solalokazili/ibdnijy/harvest_moon_2020_switch.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/69496610728.pdfIn PDF document text
    • http://testrun.ru/espresso_shot_nutrition_informationkylqh.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxarufodir/H1jiMib/zowawasokipuribenefolime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464865/normal_601a627339faf.pdfIn PDF document text
    • http://prodson.fun/xinavuniroburubu3rgve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_6019babd1cb51.pdfIn PDF document text
    • http://bt-management.website/wixulotadaxsqt7.pdfIn PDF document text
    • http://pe50off.pro/envelope_address_template_a4mosc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mulozeraxepe.epizy.com/vaziwedovaluzifisekegaro.pdfIn PDF document text
    • http://ranitirunom.myartsonline.com/que_se_requiere_para_un_credito_hipotecario.pdfIn PDF document text
    • http://wetavirevamo.epizy.com/presentation_of_self_in_everyday_life_trade_ed.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_off0000cba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA6 5768 bytes
SHA-256: 3840c299e908b89960a2a1f0e6e7d5039226eda800058424be67d58d01317e47
font_01_sfnt_off0000df62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF62 10364 bytes
SHA-256: 239ccf84ef13e82980c802f1c53c089520b93a46124f47de3a0288ecdd93633e

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