Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e8556aa32134ae…

MALICIOUS

PDF

80.6 KB Created: 2021-02-05 05:23:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0214529e72cc555015c1b163e5f80825 SHA-1: 00a18fd67edc971bd5ba70b79c00d14904c5e9f5 SHA-256: d5e8556aa32134ae2e1f35c6314aa9dcf9215f40d43de83271ce259a994a324d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'druttle.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/aws?utm_term=premiere+pro+photo+slideshow+template+free PDF link annotation
    • http://draiwenstore.online/tiwewesolarub09.pdfIn PDF document text
    • http://1green.space/sepevudesokugumexow00sfg.pdfIn PDF document text
    • http://fojozefamofu.22web.org/39233121162.pdfIn PDF document text
    • http://kaxidabifibag.iblogger.org/washington_dc_metro_map.pdfIn PDF document text
    • http://formblckr1.xyz/kedatonizulebu2dku7.pdfIn PDF document text
    • http://ecoterritory.store/pisotevexuruwop2hetv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417670/normal_5fced330007b6.pdfIn PDF document text
    • http://s7hmus.org/35117764414sg5yv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muwaziri.epizy.com/20202039925.pdfIn PDF document text
    • http://zapofekeba.rf.gd/sportmediaset_probabili_formazioni_serie_a.pdfIn PDF document text
    • http://guxasimedoki.epizy.com/56325837760.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/dragon_nest_mobile_guide_warrior_skill_build.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/59074342226.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/zofarova.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/batalimavosofoju.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_off0000fd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD09 5376 bytes
SHA-256: 4ddb79aa50d13f62d238085b91e491617e1683a9b618b95797ceebe431724231
font_01_sfnt_off00010f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F30 11056 bytes
SHA-256: 1f3095d7f977a7399a1d7c11bdf463ce0e74ac45b0c9d5a3c7586ab0f7837a9e

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