Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ecd901a1b36d44…

MALICIOUS

PDF

75.0 KB Created: 2021-02-26 10:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: fe997effb57d2a2f2893ce6e1ec181ec SHA-1: 33186c535d5c5b663311e175ee4bd373710fd869 SHA-256: 79ecd901a1b36d44a5d3c5b38888e557a34278e20e59f9833c64476311f4fd92
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The document body, though heavily obfuscated, contains text fragments related to 'Ib chemistry lab report sample' and 'wkhtmltopdf', suggesting a lure. The presence of an embedded URL and the ML classifier's high confidence score indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/award?keyword=ib+chemistry+lab+report+sample PDF link annotation
    • https://cdn.sqhk.co/fusunusol/ghhUgdt/lancaster_archery_black_friday_2018.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/27548232988.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/bAW3gdd/89140896438.pdfIn PDF document text
    • https://cdn.sqhk.co/nixagigad/fijHgcQ/bumeribamilezazuv.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/bji1wgd/figiwuwomexisazumoj.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/iaijfr3/41675479830.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/what_is_a_word_that_starts_with_or.pdfIn PDF document text
    • https://cdn.sqhk.co/rozamulev/YjdLaif/danizajijovanodasete.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gudukupir/nokego.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/41719380930.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/27797812249.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/3d_character_model_free_for_maya.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/xomewogimejenegalun.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/creepy_crawlies_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/boot_loader_for_windows_8.pdfIn PDF document text
    • http://kopolug.myartsonline.com/kenmore_refrigerator_ice_maker_not_working_no_water.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/aptitude_test_in_tamil.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_off0000e976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE976 5352 bytes
SHA-256: 10fade7f2823136db9581014af8ff02686dc1533adf9b1a1243ab94189792ce9
font_01_sfnt_off0000fb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 10240 bytes
SHA-256: a1c44662055f1a65e77c86de7bad0923dc924f45540f615db9a41ff064735b21

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