Malicious PDF — malware analysis report

Static analysis result for SHA-256 99235bca1ffbe925…

MALICIOUS

PDF

64.9 KB Created: 2021-01-04 00:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3fd2705ee797e689b9e2c4358653ec1b SHA-1: d094546a27f081d0cc87a4bee02787a13bdaf8be SHA-256: 99235bca1ffbe925415778c79225beab529e41b0bd81a2d09ff1e86f59c7f27e
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=unblocked+games+66+uno In PDF document text
    • https://sojakibozalejew.weebly.com/uploads/1/3/4/7/134747186/fivugukulupudig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f8a75dee0c9f.pdfIn PDF document text
    • https://norogogobizifuk.weebly.com/uploads/1/3/2/8/132816096/jatulek-jimolo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457854/normal_5fd5fac375c88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5f8ff7161129a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472773/normal_5fc96de0498fa.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/2885265.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/0c749c64-1b65-4126-9d6c-6608ff92e26f/paludejusupikedokugiwib.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/39009729586.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/ditixexavuwuwog.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/vmware_partner_portal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3ad373-5c12-41cc-9e56-77712ff0fbbb/red_or_blue_loctite_for_flywheel_bolts.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_off0000c2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AD 5512 bytes
SHA-256: 3e9c05f2278cc6548e1fe0f4de705b874d1a7bce28bb47f1ad03a31045db725e
font_01_sfnt_off0000d561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD561 9944 bytes
SHA-256: ed3393ac4eccdbc29395f0238b04403cbafc242efaf54ab9eed96f5edf33f662