Malicious PDF — malware analysis report

Static analysis result for SHA-256 828184619f957628…

MALICIOUS

PDF

89.7 KB Created: 2021-03-23 21:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 260d8268aae841030857cd0e515501c7 SHA-1: db3cd9b1c305b8db29b864e2fef23c4dccc09c32 SHA-256: 828184619f957628b7511badec3cdf09bd9899b6bbc97d2de9378351ae7afa45
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/wix?keyword=ori+and+the+blind+forest+abilities
    • https://vomedizi.weebly.com/uploads/1/3/5/3/135312409/dijesomu_dujedelupa.pdf
    • https://gexifimi.weebly.com/uploads/1/3/4/6/134672357/zigilunukejes.pdf
    • https://cdn.sqhk.co/xuzalolotagi/NxHiegn/movie_poster_wallpaper_1920x1080.pdf
    • https://cdn.sqhk.co/fozozumaj/oR6hchc/83760033400.pdf
    • https://koxijarekaze.weebly.com/uploads/1/3/5/3/135326688/fupew_vivad_bevogokemunig.pdf
    • http://daravto18.ru/83710408781tf42u.pdf
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/fc52deabb1bfb.pdf
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/3067816.pdf
    • https://fuwozubasuzej.weebly.com/uploads/1/3/4/4/134473550/mewaxuwobezi.pdf
    • http://brumbum6.xyz/59767049539b6grd.pdf
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/fc973feb63.pdf
    • http://converstarget.ru/comparison_between_maslow_and_erg_theory8wdwx.pdf
    • https://pesulomerusetus.weebly.com/uploads/1/3/4/1/134109359/08d5bf9b646cf9.pdf
    • https://rakawixedisika.weebly.com/uploads/1/3/5/3/135324789/16c5eb34f3f.pdf
    • http://gbo.guru/medieval_europe_war_tacticsmg22e.pdf
    • http://pristav.pro/mijew5hbkv.pdf
    • https://pabimoju.weebly.com/uploads/1/3/3/9/133997489/4439869.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kefefetafij/vogibatut.pdf
    • https://s3.amazonaws.com/tosego/kotowaza_all_guide.pdf
    • https://s3.amazonaws.com/jukoxisojow/magnetism_worksheet_for_5th_grade.pdf
    • https://s3.amazonaws.com/devuxuzejozam/xda_aa_mirror.pdf
    • https://s3.amazonaws.com/nawosineromigi/what_is_the_current_operating_system_for_windows.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101b3.bin
f49b5e61688806001e407531d9304df054f6d1625f5e39399c887c05e591de36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101B3 5164 bytes
font_01_sfnt_off00011327.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11327 1800 bytes
font_02_sfnt_off00011bb4.bin
7ce1eb8f98da1673f88e024fb49707c793d8923f550b17dd443893464ea00cff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB4 11140 bytes
font_03_sfnt_off000141d9.bin
60ec2bb429f1605e1c6fa062795d22105af1ae30747f2801018bc41cd3d974b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141D9 16936 bytes

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