Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7f6ef815b51d60…

MALICIOUS

PDF

74.5 KB Created: 2021-03-04 21:35:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e9342ded5d5db75a4d3ccd0b6ba4c81c SHA-1: 41a270aa2f33aa8dc59ba3608b6593f061d28df9 SHA-256: 0f7f6ef815b51d60c3bc008b54e963a14e3203b7d6937dfc2b7ff92f4396bc03
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or scam campaign. The document body, though partially corrupted, suggests a lure related to weight loss. No scripts were extracted, but the presence of external URIs indicates an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=what%2527s+the+perfect+breakfast+for+weight+loss PDF link annotation
    • http://huaweistoreukr.xyz/star_delta_wiringnq02q.pdfIn PDF document text
    • http://eferevole.com/what_do_you_use_to_clean_glass_top_stoves1exi.pdfIn PDF document text
    • https://cdn.sqhk.co/navuwamas/hhpjOQF/diamond_league_lausanne_2020_nrk.pdfIn PDF document text
    • http://riliman.22web.org/weathermaker_8000_code_43.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/Djaihid/touchgrind_skate_2_mod_apk_iphone.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://uploads.strikinglycdn.com/files/3fa50627-82c4-42bb-b148-4e642b899ae7/tesufokodaduxu.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/95179516096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c80c4d7-fa86-492d-8b0c-ad078a061488/10834614576.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/angularjs_templateurl_path.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/demibeto.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/65753588872.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/dikavav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa8d594-05d6-489f-9108-61351b24afec/napetenesoboxutota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36dfda34-f384-45a9-a922-ef83bc7078a9/zevibozaguz.pdfIn PDF document text
    • http://jujovotusenugo.epizy.com/bluestacks_for_windows_8._1_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6733cd75-d74b-414e-b208-3b7399b33799/wurebomemosufexot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86627041-0faf-401e-acbc-1936cb833f96/what_kind_of_bulb_do_you_use_in_an_oven.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_off0000d8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F2 5304 bytes
SHA-256: 5e54e8a94c188e712fa439a31a3cfc0991c9d101292abf91d5815cb6d6923a81
font_01_sfnt_off0000eb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 10336 bytes
SHA-256: 1f6c6e7e63361fe5c23dd6aae096213a60feff3d8b8ef539d5121cc2470690cf
font_02_sfnt_off00010e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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