Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d41756ab62f6923…

MALICIOUS

PDF

82.1 KB Created: 2021-05-06 06:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 78e67323936a7ac4fe1eed73448585d3 SHA-1: 21ff06303a857cadb9a7460f6354636186ef0940 SHA-256: 1d41756ab62f6923a3f418ab0a863081f67ef226e2478bc7fa6085581c1ca7e8
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous external URLs, with at least one identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to a 'book report template'. No scripts were extracted, but the presence of external links and the overall heuristic profile strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/strik?utm_term=book+report+template+8th+grade PDF link annotation
    • http://4d-5d.com/blender_2.8_for_dummies_4th_edition0zpu8.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/98183831017.pdfIn PDF document text
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/mabigoge_jesuz_nigojozikeludad_mupazediluti.pdfIn PDF document text
    • http://gtomishebs.xyz/fruit_worksheet_for_kindergarten0axe3.pdfIn PDF document text
    • https://ripodomix.weebly.com/uploads/1/3/0/7/130775876/7643248.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/cb476610b3052c8.pdfIn PDF document text
    • http://prizinsta24.online/b_arch_question_papersm0ek.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/94930443918.pdfIn PDF document text
    • http://agent-spv.space/school_psychology_phd_salarymy72v.pdfIn PDF document text
    • http://wersita.fun/61908470753f5bbn.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/a72e6f3b-6907-4581-a2bf-50ca5cc7fbd0/psycho_book.pdfIn PDF document text
    • http://dubanexotokegel.myartsonline.com/types_of_pathogens_and_diseases_they_cause.pdfIn PDF document text
    • http://liduvitulugug.onlinewebshop.net/wabudamigog.pdfIn PDF document text
    • http://wimifus.rf.gd/autocad_3d_all_commands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5885b3-c253-41fd-8379-84e9939c266e/78092142221.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/22250692796.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/datasheet_esp8266_12.pdfIn PDF document text
    • http://pinisexukatata.rf.gd/tafipimolegikiboxakega.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/tabekupumevogu.pdfIn PDF document text
    • http://pipovafalalum.rf.gd/robunozugununasu.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/kali_linux_highly_compressed_iso_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94dd5dd7-ecc1-4eed-bde9-919eeed1e2b7/chocolate_dapple_dachshund_with_blue_eyes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1325d8a3-52dd-4a7a-b163-20cd13f6b12b/thank_you_very_much_for_replying_to_my_email.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd70430e-2117-4a08-a60b-9cf74f99c385/52944878211.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_off000103b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B3 5504 bytes
SHA-256: d0f0041ac94100a91c34d0f49beb76f351782405c611466084a0fd28733a5e28
font_01_sfnt_off0001163e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163E 10700 bytes
SHA-256: bc6439d2613e7cc4ef08a392e9081e298bef538c8a7983df1dded3e589428c13

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