Malicious PDF — malware analysis report

Static analysis result for SHA-256 be82a288c52c6ee6…

MALICIOUS

PDF

73.3 KB Created: 2021-09-23 18:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5d4e4bda2cd79051bd43a9378d556b9b SHA-1: cff277ee65850bdfa6083086c1a238c0a95e826b SHA-256: be82a288c52c6ee6ad577316cac1e202468169a11498cadea2fe132f27eceaf7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of command-line tokens within the document text, which could be used to execute malicious commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://oniceh.ru/uplcv?utm_term=how+to+change+video+thumbnail+android PDF link annotation
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/j17pmamu6u1p0c6ck61u0m4900/26091465036.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16137bf6929f77---sexuxasanututuberuv.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/91128333941.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/895cc50539e5d6bfee6cb43691ef62cc/dolerotat.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/razovukamekugo.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/68842904361.pdfIn PDF document text
    • http://safetruck.gr/images/file/sofefuluzudifogixamomox.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/969262c8291f23875318b1a3d0e18f34/39755677481.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/pemawenegivok.pdfIn PDF document text
    • http://kodemari.info/data/files/71849757717.pdfIn PDF document text
    • http://vocal.bpv.su/content/files/files/raxefawipoburexoxi.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/26599909319.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/wavivunizafukadavos.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/fifasibozabofekef.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/rovafodasejoxawa.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/19504715152.pdfIn PDF document text
    • http://studioaeditecne.it/userfiles/file/86251692097.pdfIn PDF document text
    • http://art-ball.net/files/file/29484412137.pdfIn PDF document text
    • https://whitesal.com/data/images/file/3425_20210918023024.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/45038677498.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb876971a6---95791365071.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/lezerawumetilokupexomureg.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/34496556946.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/zomaliwerimifefogi.pdfIn PDF document text
    • 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_off0000bb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD314 16896 bytes
SHA-256: 6c334fc98a8c0f3116c0d41da5206a1e4c4fd5879cd2ea7a33fa2ba749f507a8
font_02_sfnt_off0000fe4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4E 11032 bytes
SHA-256: 85072deb137c750ecf77862551bc331d7ac10b1a320309cd19168c70c3eabfec

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