Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74be04aef5a28e5…

MALICIOUS

PDF

78.7 KB Created: 2021-03-16 03:00:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6a3e6dfe2c68af1a5af28502de5ff67f SHA-1: c0a5bbbe4a5c52dda2f3451206be8505329bfb4f SHA-256: e74be04aef5a28e57933336191fcb98ce55de1a46d24ae4d511e995bed6d2f7d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'vilenefex.ru', which is associated with a 'minty pickaxe code for sale' keyword, suggesting a malicious intent. The PDF's structure and the presence of many links indicate it functions as a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/wix?keyword=minty+pickaxe+code+for+sale PDF link annotation
    • http://clubstore.pro/free_certificate_of_achievement_award_templatef50fd.pdfIn PDF document text
    • http://dkmz2.club/sc2_co_op_kerrigan_guide0r7oj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_600ca889a7e83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488103/normal_5fd7c4981701b.pdfIn PDF document text
    • http://momentikshop.space/lakanunemit3mo93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_6002d695ec227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460680/normal_5fdebc5d646a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_6041978a6c9a6.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://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_25c99bfbfd7d432fbb6ec9dd988e963c.pdf?index=trueIn PDF document text
    • http://rokopuma.epizy.com/rekagal.pdfIn PDF document text
    • http://pinezininefos.epizy.com/52198687974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9a6f47b-0422-46d9-b338-c65395b86d20/20293236668.pdfIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_fa337f510d4a421d8cf052b66ed23480.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jimugivos/solving_quadratics_by_factoring_word_problems_worksheet.pdfIn PDF document text
    • http://luwawabegopit.rf.gd/cartoon_doraemon_picture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3adef93-7a33-4573-886d-dcd0eb5fd4b5/breville_toaster_oven_bov650xl_manual.pdfIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_4f2f1b3408eb4bc1aaf70767a120f91b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/temoloratodadugo.pdfIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_e62fbb3325ec400fb389349bd5c14d0f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ritoma/secure_boot_disable_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cac5855-a066-426a-bdc7-8d4f835093b8/restaurant_manager_jobs_east_london.pdfIn PDF document text
    • http://kakiborul.epizy.com/siwugakiwew.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/the_fire_next_time_james_baldwin_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c65c1c-6c0e-4a5c-9425-edfc1ffea91c/left_handed_ukulele_chord_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/gadesuwetexizofago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d6f471f-c43b-4a4c-a924-9e553791bf8c/50950976343.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_off0000e77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 5176 bytes
SHA-256: 592a905f6e78b64cffaf55cdbdfd22bcd8c69cff2b16ad48d4676ac183e795bf
font_01_sfnt_off0000f932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF932 10504 bytes
SHA-256: 3b07e6a11b05b0f65339bdbaf20a25bf12b5cebbc0765dd7bbc420f33cb7750c
font_02_sfnt_off00011d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D48 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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