Malicious PDF — malware analysis report

Static analysis result for SHA-256 b52200949577cf35…

MALICIOUS

PDF

81.1 KB Created: 2021-03-29 12:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 715cf022f14ac23c89a20452726f9a53 SHA-1: 6fa3a806fe7e6b7f1c06970a5c5654ef77d8a447 SHA-256: b52200949577cf357b9cc609a243f9255c70de78e4c73c311bb585c2e8f52dcb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though truncated, suggests a lure related to 'gba emulator online multiplayer android' to entice users to click on the embedded malicious URLs. The presence of multiple external links indicates an attempt to redirect users to potentially harmful websites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/123?utm_term=gba+emulator+online+multiplayer+android
    • https://vepimogarib.weebly.com/uploads/1/3/4/8/134856589/17c92d38fa5fe4.pdf
    • https://cdn.sqhk.co/wefegiwezon/kgffxge/change_eye_color_app_online.pdf
    • https://vipefujalebir.weebly.com/uploads/1/3/4/7/134744486/3514847af31.pdf
    • https://cdn.sqhk.co/bepesewutu/jvsTjdn/49581679265.pdf
    • http://feelslike35.com/sovipyyawc.pdf
    • http://ruvujagefeko.mygamesonline.org/wu_tang_clan_series_next_episode.pdf
    • http://texoraw.sportsontheweb.net/tivivekezefafonujutovev.pdf
    • https://cdn.sqhk.co/zapajugadira/igicAvG/zombie_hq_game_download_uptodown.pdf
    • http://dabukim.mygamesonline.org/11937149969.pdf
    • https://febawamowezifu.weebly.com/uploads/1/3/4/5/134594075/6506915.pdf
    • http://babitilakibo.mywebcommunity.org/xamotaxiwugupejoz.pdf
    • https://cdn.sqhk.co/nigudovowa/jzAwYdG/harga_printer_3d_anet_a8_plus.pdf
    • https://lilugotowo.weebly.com/uploads/1/3/2/7/132711957/8862295.pdf
    • https://kapelivoxiri.weebly.com/uploads/1/3/4/0/134040857/zuxezevosariro.pdf
    • https://cdn.sqhk.co/tonuviwa/iajjVge/laposufetipejimiwabolur.pdf
    • http://itawegan.fun/android_emulator_for_win_7_64_bith1k2n.pdf
    • http://nigoguno.scienceontheweb.net/architectural_acoustics_marshall_long.pdf
    • http://kawasus.scienceontheweb.net/nifasegimilog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kawerulim.onlinewebshop.net/carga_electrica_unam.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101d0.bin
81bdb78def360a03b584adf4a4607d4bbc073c543521335df2e2e2da68a2b963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D0 5200 bytes
font_01_sfnt_off0001136e.bin
b163011e9fc2378d5d61d21097f6256fc43ef3d712c98e13b2c6d015f5c93ad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1136E 10492 bytes

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