Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee881bd3274a144…

MALICIOUS

PDF

83.0 KB Created: 2021-08-07 12:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3b58bcd68d6d155f57d3613484c68403 SHA-1: 369767e4b66c0db009338af3f02250f6a00efacc SHA-256: dee881bd3274a1443c26a6df407d6cbe7e056ed840659c415a01ffc12ee12d1c
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. Numerous URLs extracted from the document point to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=fixit+laser+level+pro+3+instruction+manual PDF link annotation
    • http://daiduongmetal.com/uploads/ckfinder/files/denosasazojixujirawar.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/wezinulilogikovi.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607eac9e9bf4a---misetokuli.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/fevezurovazigexaronako.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b39dae6e6---21364462469.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c661a9badb0---jifuziresematuxeniv.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/9cb088df9492ac11b503c44c0719c74a/39030836088.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/40185143623.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/tikodanejorexakuvon.pdfIn PDF document text
    • http://tinnaduraflex.com/uploads/files/32249836906.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f570c1775---fagobinogunulijudum.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/k1tuac0fak90jnebtclimlboe2/pesufaborari.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c6a0ba88f---20332218704.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/69676656528.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/24200913838.pdfIn PDF document text
    • http://elitvorota.ru/f/file/40388610932.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/38506050972.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/64d55202fe473c69a9fe6815aa5400b1/20135057951.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/92725166107.pdfIn PDF document text
    • http://attlas.center/userfiles/file/xurefofoveg.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859a50a73b9---56446851320.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/dge7cddo6iav3d0ipfu09m2fa2/52296213428.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_off0000dddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F1 17288 bytes
SHA-256: 6e2df890e61047c03ba43d5f2c38bf4df2be0a9fa02bc6bb01d25e0c28b6e6a0
font_02_sfnt_off00012370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12370 10952 bytes
SHA-256: 3b97c599f02defbd7b62024a14f834e9544aba2ec6052cea1f5be26a845d00c0

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