Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a692e814977b961…

MALICIOUS

PDF

76.3 KB Created: 2021-06-25 20:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b50d5a238cfd9bd1eb28aba1ac88656d SHA-1: 36c4ac235974848e5169988e951d07dc356ce252 SHA-256: 2a692e814977b961c7a08e580f42a3781849017243a0a1c6c642ce0a23b3d2b2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a payment redirection lure. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to phishing pages. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the phishing lure pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://crysiq.ru/uplcv?utm_term=writing+a+check+on+a+closed+account
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/e6a97350aa3ec3d693f501a21b1aa595/zofegeserovuvova.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/skerh2fstge3m2dbvbsnjkr1h1/bosobagadokirutero.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/6e9mpbgalg3f58q85c44ar48et/sexijovevufom.pdf
    • https://angkoronetour.com/userfiles/file/33230706102.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608a45ef06ac7---witakovizojivazalutewu.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/9937ea595479ad7a4c0bff4323fb6455/nudavabikiforadi.pdf
    • https://prairieroseclothiers.com/FCKeditor/file/sexal.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd12496b3b---muzaletubefesepesakono.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/65727162781.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/9afd4bea11077d89bd1bdf6a7f5bbe08/dijovoponefetex.pdf
    • http://analogsys.com/uploaded/file/234142310609ee2245f393.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/632e3b311601fc040f3722c1b8be09e7/rinunijifufavusarubibotuj.pdf
    • http://akinmedikal.com/uploads/file/sisekilaxogasezagutop.pdf
    • https://poolpoint.be/uploads/file/zasiwotibesukolorapid.pdf
    • http://bumsnab.ru/uploads/files/jiruxope.pdf
    • http://onishi-kyosendo.jp/archive/31248995794.pdf
    • http://etenindex.nl/images/uploads/49302582180.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/c3a501c64d57b7a20bfcf23e0958fee1/bebatefelemafeboguw.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/27f4f1ca819a741a566b764317283cbf/98966769628.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2006b8ff4b---57680202413.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e9b1905c7---49931089827.pdf
    • http://hzjksj.com/images/upload/File/tivejanejigopizikanewis.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://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_off0000caea.bin
83cf85938d9906625289834e789c0e6ce683628825ec39a20801be71863bcfb2
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEA 10836 bytes
font_01_sfnt_off0000e3b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B1 16792 bytes
font_02_sfnt_off0000fbc3.bin
0877a883503a070065889be835087c7fb3c73c5d33f037c16f52cfeab7a11b16
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC3 15672 bytes