Malicious PDF — malware analysis report

Static analysis result for SHA-256 1344e004ce677db4…

MALICIOUS

PDF

71.4 KB Created: 2020-12-13 21:55:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3210ec8e1bfb07ae1a69e5a124b3c61f SHA-1: dd417d3c08f906f212cc4722c2f1d506c67e0ec7 SHA-256: 1344e004ce677db4f8326657281298033681ddf542db96219664769b828049fe
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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/aws?utm_term=average+speed+word+problems+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421477/normal_5fa7eba728cf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5f8cfe032a0fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427793/normal_5fbd0af2e8235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_5fb2f72bd2662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_5fa2ce0f622dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385852/normal_5fcc4e2d955ec.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
    • https://s3.amazonaws.com/jasadavebaga/chapter_10_review_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd26fb25-ab28-4145-8702-12c280d36b8e/xafajigonafagukubetujez.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/wevusaroserogafipupozipex.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/37749284133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193028b8-017e-4e85-a8a1-ad3c564786e7/95451390449.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/7580034139.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_off0000cb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9C 5352 bytes
SHA-256: 9a02c0b5124e8c851f4567c7cd6015df83d1ea061375cd6c7f098a8a589bfe1c
font_01_sfnt_off0000dde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE3 10664 bytes
SHA-256: 8e287fb7000dc7700232697f602a392a98b2986b4e41672457f340a69b51895e
font_02_sfnt_off0001024a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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