Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8db6484d5f1525…

MALICIOUS

PDF

71.9 KB Created: 2020-12-15 07:28:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 22117a6693cfef97a0fbc8082044b6a1 SHA-1: ea6cf40c94fb23b7a01e3d9641807468799337d9 SHA-256: eb8db6484d5f15251d7cb1dc4fc5c0e1d1fbd67978d1d358b7a595eb594bdba9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'https://traffking.ru/123?utm_term=print+nice+tables+in+r'. This URL is likely part of a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the presence of an embedded URI in a PDF, combined with strong detection signals, suggests it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=print+nice+tables+in+r PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485310/normal_5fb596cca467a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465255/normal_5fd708cd0fc81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392444/normal_5f95dc51d6356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497685/normal_5fd61e8008a2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426080/normal_5fd2cdfda12d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496389/normal_5fbe2e09aba34.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/safago/assistive_touch_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/kimajudamanagekivol.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/15691638157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af57481-3e44-4547-9b7c-0a63dff31e94/boxapugeturuvigag.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/body-_centered_psychotherapy.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/vasilipisigutibasogobog.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/wukalosutaredanizi.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/xixefagemevedakupuxijuv.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/wujusikajidulinebukeka.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_off0000cd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD01 4612 bytes
SHA-256: 8481d06c1ea4e6335a94993ce454b47d6851f14a723239bed55d27b0c946b75f
font_01_sfnt_off0000dc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9C 12432 bytes
SHA-256: 4a0ab6c8a897177b0f8c363daa7276e1901d2a153674b5e89be5b3aa176c5d2f
font_02_sfnt_off000104e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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