Malicious PDF — malware analysis report

Static analysis result for SHA-256 a687e762dcbaf4f5…

MALICIOUS

PDF

76.6 KB Created: 2021-05-24 18:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 14105ce18dee3788a5618e78c221b059 SHA-1: ccdff7cfa929b6ce55122e30d4a19d5805463b13 SHA-256: a687e762dcbaf4f5a43692639fe6cc2545ba3550f6356b45d9369cb88006d108
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, disguised as a helpful article. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of an external URI and the overall detection profile suggest a phishing lure.

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://mezovuduw.ru/strik?utm_term=how+to+increase+the+volume+on+my+iphone+6s+plus PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421214/normal_6005de296a3e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481540/normal_6040a2f2bf8ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_604491b4d9ab7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481162/normal_5fe967f5c9cce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366319/normal_5ff94abdd455b.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/74330c39-a80d-415c-afd3-8197cf6cfa6f/93730383389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429cfeab-f60f-4379-84ba-b8ba8272e6c9/61872978181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3fc9b61-a952-4dba-a418-14c8c0d06a69/trader_joes_fearless_flyer_november.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fdcba80-e43c-4792-ad5b-0b6d5ee22ee6/will_it_snow_this_year_in_portland_oregon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a61574-039b-4888-9a53-fb9c3520a6da/requirements_for_a_general_contractors_license_in_north_carolina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64d2d35-ac99-470a-acf3-5b8da4d2f95e/51305120096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb0a3ca-2d0e-4dd7-a476-3d09b2f73545/34114676087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71fe3b6-0899-4e60-838f-037521cbf1c3/how_to_start_a_compare_and_contrast_essay_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a80173c-3e06-4595-a643-fbc5a7e4a8cc/acts_3_niv_bible_gateway.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ec33c6-5e21-4d98-ae6b-533469b4a7d7/what_charities_will_pick_up_furniture_donations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def3a53a-7379-456a-bd7d-afb2ae45488d/snapper_mower_parts_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d73674-3b1e-472a-b87f-a2aac70ae922/indesign_book_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d913ca4-816e-4b43-82d2-73bbd3663753/43357257673.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_off0000eb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB96 5544 bytes
SHA-256: cc5b73af9c415976561c9013a09aacf238f191214af4e701e89eb41abb350fdd
font_01_sfnt_off0000fe61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE61 10840 bytes
SHA-256: 22323f8f9129883e71bb8fe68e0b60f078e6e207864f0e973f8877d728f9c0be