Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d208f66ea5f006…

MALICIOUS

PDF

75.8 KB Created: 2021-05-13 10:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7d8b00f71d883a65353dc641d3465ceb SHA-1: 03779624c639008b0f2d55fedbc37cb6bf334a9f SHA-256: 68d208f66ea5f006177c83ad1b49913d139dbb8757631c066a2b9553a18f02b4
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains and utilize UTM parameters, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://jottigo.ru/strik?utm_term=mass+of+christ+the+savior+guitar+pdf PDF link annotation
    • http://themarkuzmusic.com/how_to_pair_amazon_fire_stick_controllerde7dh.pdfIn PDF document text
    • https://cdn.sqhk.co/rowagana/idgelif/line_video_chat_app.pdfIn PDF document text
    • http://probkin34.xyz/21831181625suouk.pdfIn PDF document text
    • http://hook-up.fun/pelicula_100_aos_de_soledad_online_gratis3oqi5.pdfIn PDF document text
    • http://olivamebel.com/tidewuzojafotuwabevjxwje.pdfIn PDF document text
    • http://firstdoctor.xyz/what_is_control_solution_rangey3shu.pdfIn PDF document text
    • http://igbusinessabouthelp.com/lavavajillas_ariston_ll64_manual33afv.pdfIn PDF document text
    • http://goodxday.xyz/detitasufoahd5w.pdfIn PDF document text
    • http://sarhello.online/play_five_night_at_freddys_online_free6wgxc.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/jgcihv3/rabalabobutadawegijo.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/qjfjggd/berafedajepaboturezesape.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8fe2af0-b924-4e0b-b0ba-71ac5940c8f7/what_is_the_yearly_salary_for_an_interior_designer.pdfIn PDF document text
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_a72f757af82f4b4180b63a25df85f3d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec1c448-80d9-4b40-a967-3d65a9772453/76969424102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/502eac9e-9c0b-4397-90e8-f446d32153dd/47654689797.pdfIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_a2c11c2b8f164c79b3d86d42dcdb27db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba07d42a-67bb-40b8-bfee-551eacbf7c2f/dell_precision_m6700_cmos_battery.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_4b37dcb5ac1e4fb08421dbc6705de579.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54204660-ad15-405f-8ffb-5d8a54b6cd26/how_to_play_rainbow_six_siege_with_mouse_and_keyboard_on_ps4_without_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa74f5f5-a4cd-45e3-b4fb-77397c772bb8/jimuwetidoxepexigibawi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A9 5452 bytes
SHA-256: af0901b2fed9b5392fb4704c5ef28fe292dc3c0c25b76db0698ef5071c2229c6
font_01_sfnt_off0000fa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 11608 bytes
SHA-256: 3c1ffe45f2b4b4759830dd752de7356b6a283d27bdc833c1846f4d3c97e2a15a