Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2c6e1a2eb13c80…

MALICIOUS

PDF

81.2 KB Created: 2021-03-29 07:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4c37bcb0e4b8c03511f99ff01a14a501 SHA-1: 4d64e9f9af25812eec4b21acdecb9f5abeb1f0ab SHA-256: 6b2c6e1a2eb13c80a9eb1a262b6d2c546420d0c9a3878b9cc6f623b1c9f63883
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to potentially harmful content.

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://bologen.ru/wix?keyword=kathleen+woodiwiss+a+rose+in+winter+pdf PDF link annotation
    • http://vowujebotoza.mywebcommunity.org/77327983568.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/dumuredibuzamosuburas.pdfIn PDF document text
    • http://wudaxozibutix.sportsontheweb.net/girl_boss_urban_dictionary.pdfIn PDF document text
    • https://baduzizexajozej.weebly.com/uploads/1/3/4/6/134653824/c4fc7252f66fdc0.pdfIn PDF document text
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/05ba57153aec3.pdfIn PDF document text
    • http://bajelow.iblogger.org/ctfa_microbiology_guidelines_2013.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490920/normal_5ff75a96266dd.pdfIn PDF document text
    • https://nabujoxosujegim.weebly.com/uploads/1/3/5/9/135958809/9369249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474987/normal_5fce16e977bc7.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/kidizibinaxubegigi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456135/normal_604cd1c853acd.pdfIn PDF document text
    • https://biwezufum.weebly.com/uploads/1/3/4/8/134872286/97649076896.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_44ec8c60f9a74381bdd2f652535ff109.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb65188-c9f8-4e6e-b157-fb4f60b76de8/gamesir_t1d_remote_controller_for_tello.pdfIn PDF document text
    • http://falariwupap.myartsonline.com/pps_bursary_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43914912-c5e0-4de7-b242-b18074541d5f/how_to_export_garageband_file_to_imovie.pdfIn PDF document text
    • http://datidalumoz.rf.gd/life_and_death_book.pdfIn PDF document text
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_7bd2254bbda54d56a2f1c8eb9305ac28.pdf?index=trueIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_58a37743b78d4c49bc5e1588a0c30d5b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d31ca4-f70b-4701-9bbd-e65b8963cade/film_fifty_shades_of_grey_2018_full_movie_subtitle_indonesia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef564ce7-9e9c-4464-b9bf-493703ff3ca5/87795892486.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_off0000fdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD0 5188 bytes
SHA-256: e9f34e915afa110daf682209d22ae3c4d4c2716cf19eeb07d11e15425b45fd47
font_01_sfnt_off00010f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F88 11272 bytes
SHA-256: 83d5291eb907988fa07e5982d59687e315cb67ce2d102b41aa6c571ef8326556