Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3970747d187600b…

MALICIOUS

PDF

85.2 KB Created: 2021-03-18 21:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d202b56f8121b1871194fab72364a21 SHA-1: e07254836dc8f1768701d0a1a56f256004a951f7 SHA-256: d3970747d187600b85e39e5dc5d5f811183f7d0a5888b7e0b283e27109c10caa
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • 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://midufefew.ru/wix?keyword=women%2527s+suffrage+worksheet
    • http://usblighter24.site/best_weight_exercises_for_arms_and_chestqktg0.pdf
    • http://formverifiedbadge.com/vipowd3ren.pdf
    • http://toppiksnack.xyz/betisawozovutuginanimewjv2l.pdf
    • https://madugonado.weebly.com/uploads/1/3/2/8/132815119/7451410.pdf
    • http://gufutaca3.xyz/rupezijojutebekaxs7wl.pdf
    • http://instapriz24.online/how_to_use_refined_olive_oiljt7ti.pdf
    • http://gayerkan.com/goxasujalakalabopovewexyta.pdf
    • https://tawisowa.weebly.com/uploads/1/3/5/3/135315305/bavidotufu_rusofew_nipakifarido.pdf
    • http://reduslim-buy.site/blank_weekly_calendar_template_2018hxdtj.pdf
    • https://poxedavuk.weebly.com/uploads/1/3/4/6/134608045/dorovaropurukuj.pdf
    • http://sodahq.pro/dusugakb51l1.pdf
    • http://hamsterbig.com/how_to_fix_a_gamecube_disc_readerjtn91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zidenigad/68959274613.pdf
    • https://s3.amazonaws.com/bitizopovopaso/musepafukabogilex.pdf
    • https://s3.amazonaws.com/wegugus/manual_casio_fx_500a_equation.pdf
    • https://s3.amazonaws.com/gofilafixu/buxurifabumukavarexam.pdf
    • https://s3.amazonaws.com/rakabexozu/pivedebexawob.pdf
    • https://s3.amazonaws.com/kezemiradigu/does_going_zero_waste_make_a_difference.pdf
    • https://s3.amazonaws.com/dazovosugev/88860648332.pdf
    • https://s3.amazonaws.com/julaxel/accounting_vocabulary_english_french.pdf
    • https://s3.amazonaws.com/taguxif/beretta_px4_storm_9mm_owners_manual.pdf
    • https://s3.amazonaws.com/zunewidimem/bachelor_of_business_information_systems_vu.pdf
    • https://s3.amazonaws.com/dubiditiginowo/9482115693.pdf
    • https://s3.amazonaws.com/kopisigapub/sozozogupexifumujutef.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001032f.bin
55ba0248b3afaad14384779e1061fd995d542f31435be56a3dc778a3b1a94a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 5188 bytes
font_01_sfnt_off000114c2.bin
ec86da977be079b45311dd347f91c0148f85006b9b45f2828d8d0f13adae8454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114C2 10688 bytes
font_02_sfnt_off00013953.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13953 4324 bytes

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