Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2146a4ffd0fea8…

MALICIOUS

PDF

122.4 KB Created: 2020-11-24 03:35:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: fbdf86ed035cb1e7df4a727451a55b3f SHA-1: 7d06f8d4193e2bf4777e41517582d890e3de9265 SHA-256: 9d2146a4ffd0fea85cdf6ee18132722152f9cf8ec6b16691ec9317a591db5961
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that is likely part of a phishing campaign. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests it's designed to lure users to a site for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?utm_term=fenomenologia+del+espiritu+wenceslao+roces+pdf In PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/9951345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5fabc2ce42aba.pdfIn PDF document text
    • https://xamaboku.weebly.com/uploads/1/3/4/6/134606559/vumebomet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5f905ef592339.pdfIn PDF document text
    • https://tebebutak.weebly.com/uploads/1/3/4/7/134744698/xokosowowufumuj-xuwenatimat.pdfIn PDF document text
    • https://lifesodoxeduze.weebly.com/uploads/1/3/4/3/134372712/lutisuxonewak_dezuwepal_gewenixozuw_firaluxurikewix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/501ba43a-37bd-4aef-beda-7f15e42fe1ce/40606936271.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/livro_o_nosso_meio_ambiente.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/bogimujadutori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9804b71b-d881-42ab-a781-b863edbc3830/99455625323.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/joputamen.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B7A 5520 bytes
SHA-256: 8a6c804c59949ec8c5c734fda5ca15c7e8a2a346965975aa17ded77bf9c959f6
font_01_sfnt_off00019e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E40 11880 bytes
SHA-256: 9ceaf95624d40d92091579bc5d216d17ca5d8aa41700eb29ddefdba8255f694f
font_02_sfnt_off0001c562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C562 16084 bytes
SHA-256: d21a7fc198e2dbcb9b040cb75dab8cf98619bf1634d79e1d2b6cd60f14bc1e82

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