Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ad46508cf097ce…

MALICIOUS

PDF

75.8 KB Created: 2020-11-16 19:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aa416f15792f5e50a91fb34c0e3b6324 SHA-1: 9d8e3fac5f040debdcb360e3a5cb4825c5ea7998 SHA-256: b4ad46508cf097ce5a69ee1a7c4d86541ccb14203b8b66724289f73431db343f
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 0.9995

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=business+math+interest+formulas In PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/xifidipadegu-xaduwux.pdfIn PDF document text
    • https://jatilesaza.weebly.com/uploads/1/3/4/3/134316516/42017c.pdfIn PDF document text
    • https://baxojozejaxofo.weebly.com/uploads/1/3/4/5/134586757/4c487c98061c6cb.pdfIn PDF document text
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/bujedavabud-sexijovizoz.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/tanikanaw/pezosizefekogamunajigil.pdfIn PDF document text
    • https://s3.amazonaws.com/vasagesorajirem/green_door_sturgeon_bay_wi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be8e53d-19f6-41bb-b5f3-c08aa0bd3493/33799861931.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/55058634219.pdfIn PDF document text
    • https://s3.amazonaws.com/wozibap/girl_with_the_pearl_earring_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/boiler_start_up_sequence.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/kennewick_general_hospital_diagnostic_imaging.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/idek_meaning_in_text.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD448 4940 bytes
SHA-256: 52cd9de81147b69db0baa3b32b74dea882168fe41e436535a93b1ce00b4fa8c3
font_01_sfnt_off0000e4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CD 2256 bytes
SHA-256: 8be9ef4a2694845cc149291ed280913bd75b50a3aadbdbd09edcd10d963e5ca2
font_02_sfnt_off0000ee55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 11132 bytes
SHA-256: 9507f6f18d713c8b937b8cd91059b393b9e8774824a7f12fbe19a7a2a607a694
font_03_sfnt_off0001140d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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