Malicious PDF — malware analysis report

Static analysis result for SHA-256 658f4d2cee76aa9d…

MALICIOUS

PDF

74.6 KB Created: 2021-09-01 07:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1251b72ab1c512d114c3e641b67901cb SHA-1: 6295e148d3756de36349633dd1a6caabcf0bd2f2 SHA-256: 658f4d2cee76aa9de10c28c91f7c27debe485bdb7df8eca3e509a859da03ac6d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of 'LOLBin token sequence in document text' indicates potential exploitation of system utilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://ailani.org/wp-content/plugins/super-forms/uploads/php/files/1de748aaf1d191ac3eb5650f9617f9ce/wokepixujaxusikimumusad.pdf In PDF document text
    • http://lab4050.com/upload/editor/file/menavosa.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/s0khvu8d6i6clbbmpkd4htegh6/sezawalifog.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/84b2c87ac9a34d1d2ffd84432a31eaf3/tolod.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105050349327076.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/b1cmda04g69aldlaqm18clsine/witux.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/eip3ufgj3lgdagfssk9fvrisf2/28267725612.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/2a24b2tdrsog3khuq18t42oqa9/wugepuw.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/dc5609c588a703f7511dbd9bd9657122/79318185885.pdfIn PDF document text
    • http://hanleyresources.com/images/vadivipapobobu.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/87305424926.pdfIn PDF document text
    • https://digireg.li/upload/raduganafofawuk.pdfIn PDF document text
    • http://riceart.ir/basefile/files/53857458915.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9197e395ae---rokabiroloviwo.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/tovuwiparoseboru.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b09ecd2323---muzamilowesirezot.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/pekajejipuzizafudowek.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/18960247054.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/2f0c81236fe4d7fdd879060e64308d54/dowerakebavidekewi.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/jokinafagoxurez.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/85842380229.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/69301737943.pdfIn PDF document text
    • https://ebooksweb.net/files/file/tabubilugapizo.pdfIn PDF document text
    • http://drtamerturan.com/file/dufatavuzobagivotitugol.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/5660128122.pdfIn PDF document text
    • https://torrentclub.vip/wIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=regional+local+anesthesiaPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E8 15252 bytes
SHA-256: 962a00dd2b94f4a42cc742fb1e82de2ec2c4e2715805450f40d45aa6fd70ce20
font_01_sfnt_off0000eb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB91 10456 bytes
SHA-256: b7d800529d89aa7be18942e5da1536da36eb7aa5e6858ec54aba85705d1cde2a
font_02_sfnt_off00010342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1