Malicious PDF — malware analysis report

Static analysis result for SHA-256 7597bf5d912d9133…

MALICIOUS

PDF

81.6 KB Created: 2021-04-06 17:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: eafd207b8b1b2dd5ec6d77b619f778c1 SHA-1: e4aadd1a903c0498359d1c7a895772a10704bf3d SHA-256: 7597bf5d912d91336a7c605a5f7f10411bec14d4446cc96bbc2ad9eb33b9e009
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to 'ponafet.ru', which is likely the primary lure. The document body, though heavily obfuscated, contains text related to 'speciation worksheets for high school' and application metadata, suggesting a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=speciation+worksheets+for+high+school PDF link annotation
    • https://bizotimugir.weebly.com/uploads/1/3/1/1/131164076/gefewaxiredad.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/tagolegebud.pdfIn PDF document text
    • https://wizemeleg.weebly.com/uploads/1/3/4/3/134307012/bidem.pdfIn PDF document text
    • http://nobukuxokosiga.mypressonline.com/lower_case_letter_tracing.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/57949413346.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
    • https://50e0a74f-e7a5-4ac3-a7a6-4cdd7b1ad00e.filesusr.com/ugd/8a9d9f_1b0f3a57dc9149cfa5fd620744f67c26.pdf?index=trueIn PDF document text
    • https://69669160-cc20-42a3-bfef-e1e1fd1f8163.filesusr.com/ugd/8094a4_4b9e968fd598444cb696e74cf5ae8e51.pdf?index=trueIn PDF document text
    • http://wobadumiravolu.atwebpages.com/xibezuriruvowutegutit.pdfIn PDF document text
    • http://sufixis.myartsonline.com/fimozavozemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e150a7ba-f22d-4fc2-a1f0-1d372d9d43bf/bosch_glm_15_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3065e2c8-eec7-4758-9aef-171c2b6b2d9b/how_forex_trading_works_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfacb456-5c49-4162-bc5f-9a9328219e3a/culture_means_of_production.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44075d17-ba18-42d0-8852-152f85d1d330/icse_class_5_english_grammar_solution.pdfIn PDF document text
    • http://solejow.myartsonline.com/darubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/687005e4-980b-4556-aa52-a9d978a4c29d/how_to_print_without_replacing_color_ink_epson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc124396-1a64-4f00-9bb2-d773d2f4213a/what_does_mildly_abnormal_mole_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc84904-fe0e-4de4-942e-9410110dfc03/hp_elitebook_8570w_datasheet.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_off0000f40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40A 5324 bytes
SHA-256: be91ec0205a849fecddcd8a81eecc75e880f586c8e6b0470ed710e7d6386c8c5
font_01_sfnt_off00010625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10625 10792 bytes
SHA-256: ae78584185109fc336f3b9a6290317462a8733d16c7de36f550be9b8f901f9e1
font_02_sfnt_off00012ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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