Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69a2eeffc1397e2…

MALICIOUS

PDF

76.8 KB Created: 2021-01-25 23:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fbb14afa6847232b132fd181a3942ad7 SHA-1: ce828a821914d5d2a35c112ee99d30c44c1ba719 SHA-256: b69a2eeffc1397e2610d7069b5d1af269b3df281ff9a335c23e9856647674727
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 flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely a malicious domain used to distribute further payloads or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to software downloads, aligning with the phishing and trojan detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/123?utm_term=vshare+pro+mod+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485943/normal_600914e79de80.pdfIn PDF document text
    • http://avto-trokot.xyz/picsart_photo_studio_app_free_downloadyymd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_600a76f91c0bc.pdfIn PDF document text
    • http://aires.fun/fijufarekifofauyk3g.pdfIn PDF document text
    • http://best-ital.fun/dominos_birthday_party_package_sri_lankay4zkv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369904/normal_5ff20a6a9202c.pdfIn PDF document text
    • http://rte-ita.fun/english_reading_comprehension_for_grade_17tx3l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489722/normal_60051b61f1697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421623/normal_5fd7c3461c454.pdfIn PDF document text
    • http://wordwild-store.com/racing_gears_advance_onlinel5ij3.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/toliwudalamem/puzimivadubojotosepo.pdfIn PDF document text
    • http://sewoxoxitif.rf.gd/fenet.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/substitute_teacher_lesson_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/chameli_movie_song_ming.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/biugo_pro_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/2005_chevy_express_van_repair_manual_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/auto_call_recorder_app.pdfIn PDF document text
    • http://mapakipoborepuj.epizy.com/marshall_stockwell_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/android_10_galaxy_s10_date.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/borderline_personality_disorder_demystified.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_off0000e671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE671 4748 bytes
SHA-256: bfdd5ed657281146baea9528588511d8bd4cfc21e75ecb50511d4e255503c8b5
font_01_sfnt_off0000f683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF683 9928 bytes
SHA-256: 59bf4f3f9eff58629f0a92a553d205e2655b9b69d972fdf0852189fada5c5d90
font_02_sfnt_off00011846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11846 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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