Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f03b6cd6ed3d52…

MALICIOUS

PDF

85.8 KB Created: 2021-09-05 03:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 93b2897552dd0efa509accfad36ad245 SHA-1: 30ff81bca43227974b09032c9508313132b57ead SHA-256: d3f03b6cd6ed3d52ddedcb4ead7e5d45530c7039ed333982556f19014e280566
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a phishing lure, aiming to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://krisoc.ru/uplcv?utm_term=lipid+oxidation+pdf PDF link annotation
    • https://cleaner.pl/userfiles/file/99160169356.pdfIn PDF document text
    • https://banghenails.com/upload/file/80223501305.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/89241604401.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/58c43a14c420a0194587f79419d21f2f/kopuzenowuxutida.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/13168125990.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/s18evuuk14vor2p78pbriievcm/21323798250.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/48685027411.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2b5d8641e---54056768526.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/k1ltoc6kkn8md0db2mpi9u6i0f/saligukapakimukadimafu.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/e0kvanbk3q5c9e2oaj4t2qp6l2/wosozavuxozotipat.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/ad1e7682cb4f6fb0d9259f943a531c01/77000181117.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/sevovivevuvikesavenotam.pdfIn PDF document text
    • http://grhs1983.com/clients/72571/File/visigori.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/1f425ad6d28b79ea61a70883051b466c/fipomojutexesoreriwazan.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/78358499897.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/dvb7e132pi21ihmhpov410i042/sunakogufekiraniwegi.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/3e8051323cbd243d9f7518a836c56101/neteroxakakolu.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/37314257284.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/4f88f526d1780f76a4d629b613a622a6/nigejedabujusalazo.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_off0000e7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC5 10104 bytes
SHA-256: 8f765d9f9f9e1526d58a36ac0595c6168a053bfa8059c84bd88d905594aa76ff
font_02_sfnt_off00011661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11661 19700 bytes
SHA-256: 0cc8d1201e2224b8416e730b9358eac8e18531d94f3118dcb0a5ff79f006d952

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