Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73fb9acf67aa74c…

MALICIOUS

PDF

78.0 KB Created: 2021-09-18 08:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 053d8e296758f2335100df5e0f01ffc8 SHA-1: 9e2f162dda91bb069df8fd271f1371dcb134580e SHA-256: f73fb9acf67aa74c675ab7ebec28fa4c3ea3c32cd9a3484750c6a7a755539a85
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is described as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and external links suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=how+to+save+a+video+as+an+mp3 PDF link annotation
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/retote.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/fopiwazapowilonabipagex.pdfIn PDF document text
    • http://royal-pizza.eu/files/file/nikupedumumagil.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/mifem.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/nibivenedoboxe.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dc9ea5cd0---retegunibitolevive.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/gapopuridevejotepab.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/75013576160.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/rewopiso.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/r50j507q988git23u8te1rgjj5/bidogezuwavurulozojo.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/binugefinolefavi.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/51208251238.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/77202466584.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/gidarizopesukubom.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/bozajose.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/xezugesiparareviboxer.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/67334130916.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/nanekaxenidi.pdfIn PDF document text
    • http://corkpotters.com/images/sekarasudavuvekomeno.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/wawevimuno.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/panuweboneze.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/58771426621.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/16065837238.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_off0000cd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B6 10724 bytes
SHA-256: 44bec41bb35a1da35be055f1329279e8abf3bd6f4376312aebab0744a24434f8
font_02_sfnt_off0000fe55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 16976 bytes
SHA-256: 27e5614ac5363a313b6ef043049a1312b2f236bbd205e2ddc18ee55a16c259be

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