Malicious PDF — malware analysis report

Static analysis result for SHA-256 1755677b9110c6bc…

MALICIOUS

PDF

74.6 KB Created: 2021-09-08 07:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b8493828cacf847a1b449bacf473632b SHA-1: 59a0822d1b136ba1e37539d78556a6b3a6d714af SHA-256: 1755677b9110c6bc489b5ab07c2d1c3d03b4a189a7a8f982683049c0e2a5c280
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and link farms on disposable or compromised hosting reinforces the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://chcial.ru/uplcv?utm_term=haulotte+4527a+manual PDF link annotation
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/3ba4bdb0905e2584ccbb88dce2660727/metadoxagidolujirimum.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/padekesidozikavifa.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/xotilil.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/8dlpftl3h073shs08fl2bmq3f2/58360087537.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7cc838b7e---gobosokinama.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/65865608157.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/41692640450.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/rj1befhrnlfvja1ahhal61m2j8/liradujobifuliwe.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/56247953952.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/4f5550c30409186db5c1c1d59a499c72/15899451502.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9920a611f---50413950505.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/7flm4iunfh504sv5d2kgcvcu87/jaguvukaxemiwepavov.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/28232247080.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/36988942166.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/kk2e1f43k5p691grtgsadv2crl/bamaredojenofuragedomati.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/b2307f767ffba524536eec64309af12d/bopejonubixijisemamipuxes.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/34015182130.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e86d8a8ce34---lebawububixufiremi.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/54ednni0g63de63rc5g8g44lfi/nojinamexopugadumen.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/ot3vr4f52kuollrg7jn3u1dfkp/98905574610.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bed565e7a---xobunub.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/43871927496.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000beda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEDA 17916 bytes
SHA-256: 36599b1c9a2c479b6852bf518192eb5e83f7470ab9f5f125c5504989b2713df4
font_01_sfnt_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D4 10380 bytes
SHA-256: 7b182a121c83000bd306f79cf2bca5fe24c9584dcc97d81c702c95e27f51fe14

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