Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0213af16455852…

MALICIOUS

PDF

69.8 KB Created: 2021-01-20 07:28:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 248815255e4634bf6f9826c76d4cde82 SHA-1: 789582a20fc444f7915bc892496c4ee6766a391b SHA-256: 0f0213af1645585276a6604baa949a08e9f223d894fb6d2749357c1642f151fa
184 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites for further exploitation. No scripts were extracted, but the document's structure and embedded URLs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/123?utm_term=why+do+all+episcopal+churches+have+red+doors In PDF document text
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/02e4b5ba2c09e.pdfIn PDF document text
    • https://wiraxupafetob.weebly.com/uploads/1/3/2/6/132696263/kuvexuxexotuzub.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/tezireforu.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/jupop_lubip_pasomuminado_pabazapogawefu.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/5hjjijg/best_free_police_scanner_app_for_android_2019.pdfIn PDF document text
    • https://witaretazijaw.weebly.com/uploads/1/3/0/8/130813730/xiduwa.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/6KySDJH/wokijerozivewifefiso.pdfIn PDF document text
    • https://site-1174752.mozfiles.com/files/1174752/65711796356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f9a1535a11a6.pdfIn PDF document text
    • https://miwefotuwid.weebly.com/uploads/1/3/0/9/130969826/fa195061dec.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/iiheIhe/hockey_monkey_locations_ca.pdfIn PDF document text
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/768be1962.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pejefovad.epizy.com/37608906042.pdfIn PDF document text
    • http://tuwafexom.epizy.com/3795057174.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_off0000d48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48A 5336 bytes
SHA-256: 7ca0b0754ed0056d2570cfda9cd494ddfea4c35366bcd435a39cf94783a1bc78
font_01_sfnt_off0000e6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C1 10484 bytes
SHA-256: fadd88379dc2b633a8c7f5bdaa09f750f296283b3a40ff4d74cfb14c016b8313

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