Malicious PDF — malware analysis report

Static analysis result for SHA-256 054c7955583ea1cb…

MALICIOUS

PDF

95.8 KB Created: 2021-04-24 16:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 11a66bfc4b85374af4357e60025ec825 SHA-1: df2b0262e8302b4ab71cee7c4f98fb3f21e010cf SHA-256: 054c7955583ea1cb2e3875e6a8c313b848de2f7ed2fa0f85d4795fe5390905f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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 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://mezovuduw.ru/strik?utm_term=what+are+the+different+types+of+light+fixtures PDF link annotation
    • https://tadizape.weebly.com/uploads/1/3/1/6/131637484/fiwopudivosejavaligi.pdfIn PDF document text
    • https://pilogowizimofog.weebly.com/uploads/1/3/4/6/134604263/2263439.pdfIn PDF document text
    • http://getyourcredit.info/sherlock_holmes_full_movie_in_hindi_download_720p_filmyzillaj8p9j.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/8831683.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/chemistry_atomic_theory.pdfIn PDF document text
    • http://tuforuj.mypressonline.com/building_construction_technology.pdfIn PDF document text
    • http://pasendapp.online/jodaguwudirurufobix7iaaw.pdfIn PDF document text
    • http://lobutojumakix.22web.org/reposutetusevidifakiravaw.pdfIn PDF document text
    • https://jazigibebegada.weebly.com/uploads/1/3/1/6/131606339/doparimabulumogamav.pdfIn PDF document text
    • https://wagofokixe.weebly.com/uploads/1/3/4/6/134694124/zuduvope.pdfIn PDF document text
    • http://tekelijod.iblogger.org/job_interview_questions_and_answers_esl.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/automotive_service_manuals.pdfIn PDF document text
    • http://dipitazifageb.iblogger.org/wosufapezekugikenotunag.pdfIn PDF document text
    • http://rkconstructionsucks.com/basic_civil_engineering_book_free8xs41.pdfIn PDF document text
    • http://covidcapsule.world/60626490621tc7cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vobuxex.epizy.com/what_income_is_considered_middle_class_in_georgia.pdfIn PDF document text
    • http://talagolow.rf.gd/leave_application_format_for_teacher_to_principal.pdfIn PDF document text
    • http://pubupetedibu.rf.gd/77940663014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81900d88-d50e-48ce-b2b0-10345d1c3928/kixaxapuvarof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b16e9c-4a4e-45c6-a96f-9880275c4db4/what_are_math_key_words.pdfIn PDF document text
    • http://patuwab.epizy.com/sig_p226_rail_differences.pdfIn PDF document text
    • http://gemixeferakin.rf.gd/aiou_solved_assignment_2018.pdfIn PDF document text
    • http://lugifer.onlinewebshop.net/24348264958.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B13 5368 bytes
SHA-256: 59d13cbfd4bf6bda51f9e8c608646b50167c640a9ae42ec7152d87d9a712b982
font_01_sfnt_off00013d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D69 10960 bytes
SHA-256: c33b7740112cd4a681b7f7fad4a1d4be698be4f405563acf3efebf75e4093281
font_02_sfnt_off000162a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162A3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176