Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e75e7605d3ef8b…

MALICIOUS

PDF

76.3 KB Created: 2021-03-25 17:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d20ae94b74d0a239ebbda2a6c1cdb2e1 SHA-1: 98f67d86db85c18b917b35bebb41ef59ef9223e6 SHA-256: 85e75e7605d3ef8bcd0cdfd5d800aba99eb844d3e9be0e405d6a553ab09dc305
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'dialysis meaning' to entice users to click the malicious link. The presence of external URIs and the ML classifier's high confidence score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/award?keyword=dialysis+meaning+pdf PDF link annotation
    • http://tibagisuminove.sportsontheweb.net/asymptotes_calculus.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/batman_the_dark_knight_rises_full_movie_download_in_hindi.pdfIn PDF document text
    • http://bulakirip.getenjoyment.net/92230714218.pdfIn PDF document text
    • http://rakapugijumub.sportsontheweb.net/2020_cadillac_srx_service_manual.pdfIn PDF document text
    • http://konalofasu.mywebcommunity.org/76335812775.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/sutiwafomevetasuzab.pdfIn PDF document text
    • https://cdn.sqhk.co/wunemuruk/jZijO2t/youtube_tiktok_mashup_october_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rowojazur/MigugfB/tangle_teezer_amazon.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/a0c73286-0b59-432c-90a3-c671d58ad6a4/xomawofemikokoletuxaki.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/mobew.pdfIn PDF document text
    • http://najukelosuned.myartsonline.com/rafepapavejomotizusefedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55819279-c3e9-441a-b4ff-73a4f01e49dc/rolusobipego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53938d66-5954-4e45-ad01-75d22c7828ef/85449721512.pdfIn PDF document text
    • http://posikin.myartsonline.com/humana_medicare_prior_authorization_form.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/jumowifozabidabu.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/subaru_forester_2019_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/lowodutopoxamesax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a54164-94c8-46f5-b765-90903d5aa363/david_myers_social_psychology_10th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/lipafi.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/tuvalafomesiwapiwevonu.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/mesoraxafebubalipamur.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_off0000ee28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE28 5364 bytes
SHA-256: e7b22b7a60ec631231abda1554dace03d5f957748d4bf59d17f53a5aeb535951
font_01_sfnt_off0001006e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006E 10496 bytes
SHA-256: 73620a1e43af984851e0b0e70e1f67bb1da42590b30223d43833e95987195b1c

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