Malicious PDF — malware analysis report

Static analysis result for SHA-256 97da02bd2bd3b120…

MALICIOUS

PDF

86.3 KB Created: 2021-09-05 14:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 7b59b3b5cfabf619057b0c6901704dbc SHA-1: 805e45d5f8e34ac60c1ec00812ed6f7274904b56 SHA-256: 97da02bd2bd3b1209744888eb9ee991b94aa3a47863e9ccfd07166d744c28bda
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating it functions as a link farm. The presence of 'utm_term' in some URLs suggests a phishing or SEO manipulation attempt. ClamAV detection and ML classification confirm the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://coretry.ru/uplcv?utm_term=permutations+and+combinations+tricks+pdf PDF link annotation
    • https://baoholaodong24.com/userfiles/file/14556381520.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/04e2b7f8fed565d6a5f602ad3bf564a9/12664072843.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/90edd3f6d6ce74aaf5fc0f7bf0fe71ea/zesinedew.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/siwezojef.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/8e5iparpimc7853692eqk98t50/mujeteluxati.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/9812409e60cb70434bfed4747ed447b9/59958305104.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/33a0120b547684b822aa3b899441f7e9/15251817937.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/3e6971ba642d6f4a17a44ce3621a0a28/jimud.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///2432468473.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/91846004703.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/37a4432ec32e7988f3be182adba9564b/92788513881.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/pukerukiwidubegi.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/lazibelebapuwobade.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/rixunesobinasapedu.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/debowujanugenivotenagu.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/xaxigobakabixa.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5kiau57lugecm4ghij5kgmi722/nopisezimevazimi.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/25982743186.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/tamejukesolopumo.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/subenegegi.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/dizavurulevefuxumun.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/ccac712a35be1ba46dbc366a48d283fb/11490226742.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/41481198598.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_off0000e86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 11068 bytes
SHA-256: a69831523ad60c91de0fe4b0e7621b653e78cfae46af3ca127d03812e48e3fa3
font_01_sfnt_off000101fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FE 18900 bytes
SHA-256: e46951336b1e07450aa12e4af4c9e431ef1b2bfa5a6914e30d137c27c2fcadc8
font_02_sfnt_off000133a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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