Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb38d0dab7c1978…

MALICIOUS

PDF

75.9 KB Created: 2021-03-13 15:03:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03f0ee851ba7351885002a0ecf3c99d2 SHA-1: 43023c8c6385c61c7e4c0f2428c120d0f42e8c42 SHA-256: 1bb38d0dab7c1978e0262c4eb7ad4bfdaa20f2e7085b50dc4db6aa7d1ebabda1
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL 'https://gimoguvi.ru/wix?keyword=17.1+genes+and+variation+worksheet+answer+key' suggests a lure to a phishing or malware distribution site, disguised as a worksheet answer key. The presence of numerous external URIs and link farm characteristics further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/wix?keyword=17.1+genes+and+variation+worksheet+answer+key PDF link annotation
    • http://mimivudarevi.scienceontheweb.net/lijapuvexubixunez.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/jewipabodalunet-wavevoderidevef-jijegivovuv.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/cancer_de_pancreas_patologia.pdfIn PDF document text
    • http://desokore.medianewsonline.com/the_living_bible_catholic_large_print_edition.pdfIn PDF document text
    • https://tuxibefogeja.weebly.com/uploads/1/3/4/3/134359070/853ed7df.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/a_behavioral_theory_of_the_firm_1963.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/92119339199.pdfIn PDF document text
    • http://tapagigozi.medianewsonline.com/fibosit.pdfIn PDF document text
    • http://ladiluvame.mypressonline.com/62621689870.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/monsters_a_bedford_spotlight_reader_2nd_edition_ebook.pdfIn PDF document text
    • http://kidufamipowanot.mywebcommunity.org/11010519270.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/kezudugatuzu.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/95636428686.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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://nubuzozaso.rf.gd/mixed_dyslipidemia_treatment_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba616d9f-8ebc-4d17-afb3-723cb83b206b/the_natural_baby_company_reviews.pdfIn PDF document text
    • http://veguxakafopuvix.epizy.com/hedonic_scale_sheet.pdfIn PDF document text
    • http://dukazaxotak.epizy.com/czardas_music_sheet.pdfIn PDF document text
    • http://velosipu.epizy.com/baduvurefupawemarov.pdfIn PDF document text
    • http://vukanaxugosazed.rf.gd/time_management_worksheet_for_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da48fe09-d827-46fe-81a8-4bea3c1e0605/english_grammar_learning_books.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F6 2284 bytes
SHA-256: 0790de1fd76e78f2002cc5d8caa72cac03919ec06dc20680f69ad097d56faca1
font_01_sfnt_off0000dd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD26 5232 bytes
SHA-256: 557ba84206f6f3ee237410db956263361e56d389ad9921bfddb9e4b8d5c9a553
font_02_sfnt_off0000ef11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF11 10632 bytes
SHA-256: d32fb52b72229423bdbb62a0546de584980ae2d702e47ad50e59f1b99afdb706
font_03_sfnt_off00011381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11381 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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