Malicious PDF — malware analysis report

Static analysis result for SHA-256 442685f6bf0bde46…

MALICIOUS

PDF

61.8 KB Created: 2020-12-18 10:15:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 971cf5501a5e4a12e77c71007bcbcdec SHA-1: 93f9b95a8bd47d00f8288f2818213fb179fcd9b8 SHA-256: 442685f6bf0bde46b7674325ab306652e9eaa8e093e30e9a13d48dc97222a359
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely serving as a lure for users to click. The document body, though heavily obfuscated, suggests a deceptive title related to a book chapter, reinforcing the phishing pretext.

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
  • 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://trafficel.ru/strik?utm_term=jose+de+egipto+capitulo+28+facebook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417329/normal_5f9b39b3eefb4.pdfIn PDF document text
    • https://lilepixot.weebly.com/uploads/1/3/4/4/134462463/jusumiweliluvi.pdfIn PDF document text
    • https://guwopatuzigumi.weebly.com/uploads/1/3/4/3/134334434/gipip_vemunidi_jugetadepagasi_rebadijuwoteri.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/2875d901-a312-47ac-8b01-060ac096cb0a/36706547520.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfcd6f403f5353fd8f68b6/t/5fd011bd8953eb0500048943/1607471550218/26772524600.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc587d35e8e827d42ad41ff/t/5fcf078114319a51dc284ac9/1607403394581/ufc_results_yesterday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26edb71c-3981-4cf0-8161-06c9177102d2/buxiliguxazematanijaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51afdec1-3c7f-4a52-84e2-696a1ee9312b/gepikodupazomureta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4eaaa1f-3910-4ea8-ad7f-6b14c80f638a/bimanevuwavazubevumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d498312f-db26-485e-9923-e067d31742d3/jasemasez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831cb5ae-3155-499b-b31f-018d18676099/kumorewiwasegizomafu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB14E 5748 bytes
SHA-256: ddd84cb626051fbdc28dcb5454383da45181dbb445e266009e93e625a1c94335
font_01_sfnt_off0000c4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F3 11284 bytes
SHA-256: a7c858a4e710b80a85853dced4e7f0a9c75fd9ed3770207017d28013fa18516d

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