Malicious PDF — malware analysis report

Static analysis result for SHA-256 e169cf8e349dec8b…

MALICIOUS

PDF

84.1 KB Created: 2021-02-01 17:04:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0844a38046563a79e2c9a1035154ba9d SHA-1: 3382148ae83794fe7297f4dc73bc47378d409c09 SHA-256: e169cf8e349dec8bc9b0efdb82b6d3f73bb25be0936079b4be12a5635dde1728
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/123?utm_term=financial+domination+guide PDF link annotation
    • http://jesofafisozosa.iblogger.org/wavobawoneforajaga.pdfIn PDF document text
    • https://foderojev.weebly.com/uploads/1/3/4/0/134041652/86b1e62b3f.pdfIn PDF document text
    • http://vabodulesofife.22web.org/natekakopifuvasinof.pdfIn PDF document text
    • http://lodixewovufosa.iblogger.org/78834844711.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/amazon_prime_music_apk.pdfIn PDF document text
    • http://sipomivizipe.epizy.com/mutianyu_great_wall_tour_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/accessory_organs_of_digestive_system.pdfIn PDF document text
    • http://pemukusa.epizy.com/powerpoint_gift_certificate_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/cissy_strut_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/special_chabbis_26_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/dishonored_2_guide_gamepressure.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/27773641226.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/2694426701.pdfIn PDF document text
    • http://wepezip.epizy.com/android_app_store_screenshot_sizes.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/84982742503.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/java_spring_resttemplate_getforobject_list.pdfIn PDF document text
    • http://wuwesupaletutu.epizy.com/new_movies_2019_bollywood_war.pdfIn PDF document text
    • http://revuzulikasulo.epizy.com/62586488055.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/gewawekofivu.pdfIn PDF document text
    • http://senoburem.epizy.com/29920349444.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/action_jackson_video_film.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/celtic_cross_stitch_patterns.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/working_principle_of_astable_multivibrator.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_off00010dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCA 4940 bytes
SHA-256: b2c9a3002ba33fab4450fb35892f5bb9f3cc727f6e3d1e9625b3927c267924a1
font_01_sfnt_off00011e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8A 10644 bytes
SHA-256: 8c8cb8296323c305a49acf375371e6a11d260d0ca5da618b2d0f06352318ebef

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