Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5cc49ace45f921…

MALICIOUS

PDF

68.1 KB Created: 2021-01-26 05:00:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 293881454660bfbffd1d93cae30522d5 SHA-1: c5f45c2f87c0e12f94fa3d5f7b798903682594e6 SHA-256: ab5cc49ace45f921981905c6f263a9372be6df9c68c04481a4bc366dc1083e44
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and is flagged as a link farm by heuristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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
  • 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://trafffe.ru/wb?keyword=708%20e%20front%20st%20plainfield%20nj%2007062 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487200/normal_5fe715cb0034c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472188/normal_6007ab21ee9ba.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/XKISjgy/war_of_the_worlds_epix_finale_review.pdfIn PDF document text
    • http://reflectionss.space/dimoda_salon_hamilton_nj0xlyx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452845/normal_5fee12c42673d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5fdd32e5b875a.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/iegiBjb/zunamarapadoveniwuf.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/xrhfOhb/airport_traffic_control_salary_uk.pdfIn PDF document text
    • http://dajinanumiki.iblogger.org/35749890456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_5fe7506f8d618.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/vXkiijg/sirocco_definition_fr.pdfIn PDF document text
    • http://vlada4.xyz/download_kiko_run_mod_apk_androidbu8jz.pdfIn PDF document text
    • https://cdn.sqhk.co/visevunu/tjcrKia/dukigazanevowawelopub.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/hchhggU/pamefun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_5fdd61e6c03e2.pdfIn PDF document text
    • http://voicebftyi.com/receiving_end_of_it_all_lyricsqal2n.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/hihj2cd/gazawokewub.pdfIn PDF document text
    • http://3bki.ru/8289247392925bnr.pdfIn PDF document text
    • http://odemebayisitrafik.com/pocket_academy_lite_mod_apkoy8bt.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://loratozojakin.epizy.com/dofaxofibikogefidipirin.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_off0000c0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E4 5508 bytes
SHA-256: 5693e77257bf633008a61ce91e783944e4654dacaf5a943109903d7220dbed74
font_01_sfnt_off0000d3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A2 9784 bytes
SHA-256: ddcdf238f5196af7431c1f42246c044f429f0604b4e4e6fd5e71407e940393b8
font_02_sfnt_off0000f51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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