Malicious PDF — malware analysis report

Static analysis result for SHA-256 568bcd95f2939e33…

MALICIOUS

PDF

81.3 KB Created: 2021-09-16 06:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0fda381a8a33b846f3ca666be2a6cee7 SHA-1: 685df2aa5d72d67ae701943061307b12b5c5eb91 SHA-256: 568bcd95f2939e3394d60cc02d5eef36467418120c9eb6a45f286f95c5a4403c
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. These links likely serve as lures for phishing or to download further malicious content, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16141c78518c59---darimimove.pdf In PDF document text
    • http://karpatskiles.ru/store/file/91228387005.pdfIn PDF document text
    • https://khoahoc.timviec365.com/picturesfiles/xeketuketisanunoxilikanov.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/81822263805.pdfIn PDF document text
    • https://cmoretv.com/userfiles/46386800077.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/161417bc0e0f4d---74502151870.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/kaguz.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210914_F88F076479479DF2.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/10885569089.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/molovaguketerozam.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/pejewetorarawube.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/fajitufogofaguwevure.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/161343716a98e4---pemadifubawisam.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/63830734645.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/92500848647.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/74432625229.pdfIn PDF document text
    • http://sozopolihills.com/userfiles/file/1238885751.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/zazisi.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a143daa0c7---jifazovujemigugujazawudaf.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614198c9abe2e---fazedezupapexotisawaxe.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/velomup.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/likufigimib.pdfIn PDF document text
    • https://kueapem.com/contents/files/vufisawejotop.pdfIn PDF document text
    • https://pagodatalk.com/_UploadFile/Images/file/11672260943.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=vsco+free+apkPDF link annotation
    • 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_off0000dbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE4 10196 bytes
SHA-256: df750748758f591b98f2da1a133973b0850175d686a4d71a3dbffe2940686089
font_01_sfnt_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 17076 bytes
SHA-256: e99a4195221b1f065ee743f84b3a4f9ed3fabd7f4bedeae5aff4ed4533fb4bb3
font_02_sfnt_off00011f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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