Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa93e39906f83a28…

MALICIOUS

PDF

90.1 KB Created: 2021-08-01 14:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ee544d1489d432fed7d12eee2827e9d6 SHA-1: 8ae64252a95bef83bde56e798af3a3fd5bcc7ee3 SHA-256: fa93e39906f83a281b6f9804746f8dc036d20606ab9560606a5b3cddeecffb5f
156 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and links to compromised CMS uploads, indicating a phishing or link-farming attack pattern. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious websites or download further payloads. The presence of multiple distinct hosts and link farms points towards an effort to distribute malicious content broadly.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://queure.ru/uplcv?utm_term=exercicios+frase+ora%C3%A7%C3%A3o+e+periodo+9o+ano+com+gabarito PDF link annotation
    • http://crosswaysrecruitment.com/userfiles/file/53822713661.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/81767152864.pdfIn PDF document text
    • https://csodamalom.hu/files/files/77892908838.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/976924c301dc88d4ccfcc7f72644af6e/bujibuwenariwas.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/44772943097.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/4fecc15040dbc5b68696627c2312cea8/xolokegemesen.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/4333863702.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/325487264.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/35474968560abbff802734.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/sekogiz.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/9b0a01bb3fd12b8bb38e5d4b553fc4e0/79596261859.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/82136693683.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/68895111129.pdfIn PDF document text
    • http://scpt.it/userfiles/files/jerefelab.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/10362963043.pdfIn PDF document text
    • https://myhoteltrip.com/userfiles/file/mijixubikex.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be0f3514ad1---wagamufobopewubinemaxus.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/4883633224.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1a3a755bdeb977bd86444ad13201c4e4/pabazitaduvefojukuzi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39f04531dd---wogegolegibodedabexesi.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2139674046---zibojamenexuzatarov.pdfIn PDF document text
    • http://eventechsite.com/files/files/68129262971.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c61b1739868---72563790311.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/7961147859.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_off0000f5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B4 11776 bytes
SHA-256: d7aea79726c1c2ed6413a8f5ded2b3975356eb06cd3eb8a604432688af7343b2
font_01_sfnt_off000110bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BB 19444 bytes
SHA-256: f0fa2352832fe1213ebdda4b5e3570a97691ec8164cef6647c7c5c1bfb70d74e
font_02_sfnt_off00013fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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