Malicious PDF — malware analysis report

Static analysis result for SHA-256 15032c0ae764fd69…

MALICIOUS

PDF

115.0 KB Created: 2021-03-17 01:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 75a1d4c438b4996c25dc2e02dabef4df SHA-1: 61f630fb612a1b639d0cdab585ae6e492e21fef9 SHA-256: 15032c0ae764fd69ef23fceb5cfd32b008e2ea710aa1f2b4ec06752a64406d80
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The presence of a 'download button' heuristic further supports this. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/123?utm_term=boris+fx+10+32+bit PDF link annotation
    • http://velimogoliti.iblogger.org/exercice_orthographe_cm1.pdfIn PDF document text
    • http://bifakibebus.iblogger.org/automobile_engineering_kirpal_singh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470826/normal_602e781d1510f.pdfIn PDF document text
    • http://jopkapopka.online/how_to_turn_on_vizio_surround_soundlr6rk.pdfIn PDF document text
    • https://woxawilafuzuve.weebly.com/uploads/1/3/4/6/134669094/dodisamewuluzute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_6017617086fe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_603eb6df327d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452588/normal_6041a81d008fc.pdfIn PDF document text
    • https://jafufikatovovew.weebly.com/uploads/1/3/4/4/134481731/6f496c83d.pdfIn PDF document text
    • http://ericksandoval.com/mathematical_modelling_kapurenkgk.pdfIn PDF document text
    • https://kaferafodi.weebly.com/uploads/1/3/0/7/130775544/4682261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_603d53d70a6da.pdfIn PDF document text
    • https://waxogisuges.weebly.com/uploads/1/3/0/7/130776632/d26feef8766114.pdfIn PDF document text
    • http://cryogen.me/interstellar_soundtrack_youtube_playlistqrv0u.pdfIn PDF document text
    • http://leree4.club/sample_storyboard_template_for_video18m4i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vodividubo.rf.gd/the_magic_number_seven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501f58d1-3d67-48b5-9129-36138d5d3cc2/dd_4e_avenger_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c73abaf6-bb32-4d31-9c51-8e45ca661b03/27183343234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0df07fb1-c7b1-4dad-97b2-6ee9fe0cdb5c/57786447000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b493b30-eb22-475f-b6ce-f4c499214a5d/selenium_c_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd39704-c508-49de-b8d2-14ab34f6aef5/how_is_annual_leave_pay_calculated.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e13ed71-ddbd-408a-9579-31b6abda5d4c/la_divina_comedia_resumen_del_paraiso_por_cantos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dca93fc-d7cf-431a-ae72-0383260b505f/41787872939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a376c8a9-f6ad-4312-9456-fbb2b6e6614f/venitesurusuvevosavitexum.pdfIn PDF document text
    • http://monawob.epizy.com/wivukekagubavalogeralowot.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B8 32040 bytes
SHA-256: 402ce0d8354593d3c54691ea2aa573145943e068b6ea9d5e693c724ab0df97a0
font_01_sfnt_off00016c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C2A 5264 bytes
SHA-256: 3737562a5a9714bf36385aa31db4dabd65e799e29071a7d0dd0b359f66d32ed9
font_02_sfnt_off00017e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E31 12996 bytes
SHA-256: 720a73c07fcd0980e51a98a9f517b6e65be5282569ce6f27afb48d2a04b99937
font_03_sfnt_off0001a870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A870 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15