Malicious PDF — malware analysis report

Static analysis result for SHA-256 7677050a34225861…

MALICIOUS

PDF

83.3 KB Created: 2021-09-19 11:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d4c348ff4048b9aa88fd364eeabe0762 SHA-1: 6540934267dbe9eaa00844daf9bce9f19768cf83 SHA-256: 7677050a34225861d0df5962f89f84a4d22f0b08f8bed5e6cc25d7b60770df14
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external URIs and link farm patterns, indicating an intent to redirect users to potentially malicious or phishing websites. The presence of compromised CMS upload links further suggests a pattern of hosting malicious content on seemingly legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=kingdom+of+ash+pdf+online PDF link annotation
    • http://ssaisarang.com/ckfinder/userfiles/files/67022865345.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614046cb60ef7---tedofefisujoxete.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/jaminikonewubamodij.pdfIn PDF document text
    • http://countryclaim.cz/userfiles/file/badagasopeviv.pdfIn PDF document text
    • http://santeh.md/img/files/busewugavirupu.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/5838864517.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/0316b2c7e2fe07a3bdb0a2854a991cce/gefidonozipefa.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/8983346817.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614697d2cfa47---48939583716.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/50000565006.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/aec2650e82270f7baaf5843f1ae56f94/15743456781.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/12943696706.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612efe01daec4---fuwowatakegogebetozo.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/70727369703.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161360eac2c0ec---sanosakiwe.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/90816429997.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/jafozebe.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/86706794992.pdfIn PDF document text
    • http://fourfoods.com/images/files/85810933453.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402c24c8918---roposeguvikekedimezuki.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/bazevuderepiba.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/bogategikusefadarebiluzer.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_off0000e383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE383 17300 bytes
SHA-256: daf7379cc60bbf759630f700378d5f77cfe57e407e0d3744e846a4d3812fd77e
font_01_sfnt_off00010ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001280e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280E 10740 bytes
SHA-256: 2dc4e5b41dfa81708ea9b17b664cc1580ae38bcb91ece9e033be8c2a0ffd9ef0

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