Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1f7e521c463cf6…

MALICIOUS

PDF

91.8 KB Created: 2021-06-29 04:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 11dd4a7a890f092df61d4495316ef188 SHA-1: 174049efc4e544ddf88be774e5c3be2e40e6993e SHA-256: bd1f7e521c463cf6b2567367a10008d8712e07c6dd8785dd0e6bf6926bc0fcf8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The presence of these links suggests an attempt to redirect users to malicious or phishing content, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=how+to+take+double+exposure+photos PDF link annotation
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/j6r3867hu6vl4fpp2f64a758il/zopedowisikavedejoluti.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0ad277c45f---matonijogebegamaminepaxu.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f974fa452f---rovesozima.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/jolumijogemipo.pdfIn PDF document text
    • http://beiks.info/public/file/15788441252.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/74865257668.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/9d84c8c22ef97a3dd18d139a894a189a/mulukonibafun.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afd47b48282---13779389494.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/bula38mg346loqsu0uvgbthq06/54641442467.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b69324053d---zubumonupawijato.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/nevuvuwujejexifovogegulob.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/ab4873024a1a18d0d8c674181a606b12/68129990631.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/41995399023.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/ae1b5d22114c582923b5c4fde0c8acfd/68453700888.pdfIn PDF document text
    • https://ancoraeducacion.com/images/sifasokivedope.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/84887544332.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/7648d2289c2d2f5fa7c9a940868d53fc/sefaxalijawozazobufif.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071df606f924---fovuzewotewupikepexajebab.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6e0d21023---69561814411.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/0cvsiaaoeqmi49v8d86u303gld/gebiwukefemalaji.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16089c972e12b1---21103659524.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ruh8d84vjrr6tg7tg34jvdoj20/8089801860.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/80864541448.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/025720c912596b753e8aea9b8c0a9238/vazixewo.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/nijoze.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe6c8666e4---situteri.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_off00010416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10416 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C28 17224 bytes
SHA-256: 029543c2b7d6354423e79116a5aa8b2b4673fec69d860286ba5fb8d8fd47140a
font_02_sfnt_off000148b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B2 10804 bytes
SHA-256: 18f81d3cf08a0f3d2ca5dd0420ab7c4f4b7763c6db52f7b9c0fc58b44a201da9

Open this report in the interactive analyzer, or submit your own file for analysis.