Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1de1c78b2efa83…

MALICIOUS

PDF

124.3 KB Created: 2021-03-16 08:53:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc49556905caefea73040479ffa6c0d8 SHA-1: 9a6903e14729da84e466b69adb12792121d2f483 SHA-256: ad1de1c78b2efa83c97106ce97cc07746b44fa07586d0786a669923077ba66eb
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs, one of which is associated with job assessment tests, a common lure for phishing or malware delivery. ClamAV and ML classifiers strongly indicate maliciousness, specifically flagging it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site.

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://botokaw.ru/wix?keyword=indeed+assessment+test+answer+key+reddit
    • http://hempmap.ru/putubawozuwetubobimazqdcp.pdf
    • http://lg-supportteam.com/105108179131tctm.pdf
    • http://asia.kiwi/thymol_blue_safety_data_sheettcwp5.pdf
    • http://azalea.store/bollywood_ringtones_download_pagalworld._com52z4y.pdf
    • http://show-visitor.xyz/wonderwall_projector_manualinm43.pdf
    • http://vostokzapad.su/how_to_reset_epson_l210_printer_ink_pad_is_at_the_end_of_its_service_life3e10p.pdf
    • http://odebayitrafikhizmeti.com/187950725750dh5w.pdf
    • http://euroshopmn.space/52375089298ohyew.pdf
    • http://reduslim-shopofficial.site/sojerumuzoxojozyk3zj.pdf
    • http://7gusevshop.website/home_theatre_projector_buying_guidezre6p.pdf
    • http://igrarazuma.info/79245335557sjygy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_e102d9140a3b4824b7a9e1d5e3b5b871.pdf?index=true
    • https://s3.amazonaws.com/dutuzanob/what_is_the_second_rarest_eye_color_in_the_world.pdf
    • http://jerekapubujiw.rf.gd/2824282709.pdf
    • http://zowujobosega.rf.gd/breville_espresso_machine_repair_manual.pdf
    • https://s3.amazonaws.com/pizexopenaxu/android_10_update_pixel_what_s_new.pdf
    • https://s3.amazonaws.com/mojivikapeti/free_analytical_reasoning_questions_and_answers.pdf
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_c74b939714dd44acab91eeee4579d555.pdf?index=true
    • https://s3.amazonaws.com/fosalizuzu/is_boy_on_netflix.pdf
    • http://xadebomuf.rf.gd/rodogol.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001939f.bin
859c187aa240bfc0648a0203691a0de83a275da3e27a1e77ec176f16a1417fad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1939F 5136 bytes
font_01_sfnt_off0001a51b.bin
71141345478d57d706111fa3f173c9ab11b1468d72554fd67911d4ccb9f80726		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A51B 12176 bytes
font_02_sfnt_off0001ce9c.bin
5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE9C 16060 bytes

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