Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fd14cba8ed1217…

MALICIOUS

PDF

73.4 KB Created: 2021-06-01 02:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 729ede688bd19d36b197050760c5d5ac SHA-1: 2fe73a7cba1f01b7139c81ed3281c3622dbd9b70 SHA-256: 26fd14cba8ed12173785c6814b57ec6315fa25921950ee823473400a5d39d620
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a domain associated with malicious activity. The document body, though heavily obfuscated, appears to be a lure, likely intended to trick the user into clicking the malicious link.

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://allytemp.ru/pbw?utm_term=are+navien+boilers+any+good PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370266/normal_600680d9c5259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419626/normal_604624d0bf79f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387406/normal_603ced1f8d2c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_606d3ac70e391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470699/normal_603e653a14243.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/834cde3e-ab8a-4e9d-8c9a-3dc48098dd28/woxonojulimol.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/john_deere_425_mower_deck_belt_diagram.pdfIn PDF document text
    • http://supatibu.pbworks.com/f/short_stories_based_on_thirukkural_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c3c929-45cc-48e8-a459-176e982c93e2/ludugibenonubasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a12d63c-2d30-49c7-b840-58066ce5ed1e/serezikibuzidukupa.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144428874/xotofilurajuseboximapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82022d86-e385-4c56-b93c-dfac3903dde6/my_choice_car_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/186318b2-8f39-44c7-ac77-e0ce01cb8da6/deforuluxuretanudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e39803c-1c17-473e-8d66-cdf3533114b8/atlas_copco_ga18_compressor_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9502b8f5-22bc-4557-9e28-be57e028299c/bofeloxigafunajebirale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c30a4d2b-a05c-4323-ac66-60ae4fa5cd7d/zejukozewe.pdfIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144411429/cost_to_polish_an_airstream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa39babc-6a32-40f6-8e6a-4b0a3b630e3f/how_to_eat_fried_worms_cbs_storybreak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f92797e2-846d-46a8-b2eb-fd0119f0fef7/94763414744.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_off0000e556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE556 5284 bytes
SHA-256: b4aa33b5975177de9d11180a27ec3920728a9d2da51ccdf74f28175343ff1d83
font_01_sfnt_off0000f767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF767 9648 bytes
SHA-256: 6dd6691c4ce3f5b3e8b2feb772d23ca04d69bf22b5fabfdc4ef28291e7ef4f45

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