Malicious PDF — malware analysis report

Static analysis result for SHA-256 84229c0f3b7d0405…

MALICIOUS

PDF

87.6 KB Created: 2021-09-06 15:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad0529d83062ba62d1974daec900c639 SHA-1: ee87c4587a14a26720d8ea2a6aef6e38cf5af602 SHA-256: 84229c0f3b7d0405059b539478597fe31f202d9cf45c6d718aa115a689b99166
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is intended to trick users into believing they are owed money or a prize, a common tactic in advance-fee fraud. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/e8197ee0e0f0932874667f620aa63641/radadexu.pdf
    • https://lawina-radom.pl/files/file/99664698351.pdf
    • http://goodfortune.hk/UpLoadFile/file///36101783303.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/40102932774.pdf
    • https://www.corpeverest.com/ckfinder/userfiles/files/27338281503.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cbdda691a---64983254768.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/8ab4d7cf9318a13d8d879770d443ed32/48491925717.pdf
    • https://hoangvan.vn/wp-content/uploads/files/zotiwo.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/75f0c273936c8662c6c826a7048ebc08/jimuxejofawivulo.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087de067915a---tatinij.pdf
    • http://worldnaturalfood.com/image/upload/File/fusoj.pdf
    • http://blfimmobiliare.com/userfiles/files/mevemekojexusukajo.pdf
    • http://krasneclanky.cz/uploads/38006754666.pdf
    • http://musorcentrum.hu/files/article/file/3625284089.pdf
    • https://angkorphotographyguide.com/userfiles/file/62604098468.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f7295d071f8---balisovin.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/2a20924a7741336d8275cbd039c53037/sozojomi.pdf
    • http://sambometal.com/dataroom/file/6083312517.pdf
    • http://longbeach.ilovepokebar.com/uploads/files/42560481373.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f1e318a89---20202605644.pdf
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gimame.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab55507bab---51972271500.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160e781be461ca---rasifa.pdf
    • http://progettogeometra.it/userfiles/files/sugew.pdf
    • https://www.esfa.bg/root/ckfinder/userfiles/files/xonakemunutowuvatidako.pdf
    • http://tw-jia.com/uploads/files/202108301929428091.pdf
    • http://be-now.pl/userfiles/file/5087132584.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=kiddy+evoluna+i-size+2+manual
    • 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://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_off0000f14e.bin
1fca7064167e48935b0040c80bae882441e00b937cd9fa3564cbe91e20a703c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF14E 17852 bytes
font_01_sfnt_off00011fb7.bin
68c688fc9adb7edac4630bbfc2b6aff8d7d280efcc3a3e602fc3d83845054b0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB7 10696 bytes
font_02_sfnt_off00013855.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13855 16792 bytes