Malicious PDF — malware analysis report

Static analysis result for SHA-256 d552c267f7dd9ddc…

MALICIOUS

PDF

90.4 KB Created: 2020-12-20 09:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 437881a8653470fc4dd82b7af248cb8d SHA-1: f709857dea08392ec7b9a58d10c0ae90ab4a5bdb SHA-256: d552c267f7dd9ddcf2995213755e63ab197fa5ee5a508448c72a70ea61e7babd
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to 'Cartographer's sextant guide', suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=cartographer%2527s+sextant+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404750/normal_5fdeb9cac6f39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465548/normal_5fc5ea51bd399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_5f9f55c8bb847.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405662/normal_5fc6cb1f792d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_5f91a9b4d61d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_5fb7ff808444e.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/21c340b0-b234-407b-bc16-698fff9b9c92/54016668335.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/letepovuledoxosikilewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81ac4db-0b9d-4222-a3ea-34faea5a913b/sumudologuboxetokuno.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/915109053.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/nedomivowikalewonolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a77e9bc-a027-4b51-a0ec-51b48760f213/jukaredasokatonizisajud.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/can_t_help_falling_in_love_ukulele_fingerstyle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a58fc9-fd56-4ee0-a128-026a85818f0e/luwedugajomarubawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e76560-2a07-466a-9706-edbfb7f2852a/xasefo.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/fuxakevobulesogifevuse.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_off00011a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A92 3008 bytes
SHA-256: d2a31de99f6aa32c3fc9e73d04cd36cd4a144f7150529410b1fcee9c257c398f
font_01_sfnt_off0001255c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255C 5196 bytes
SHA-256: b632c4fb768db41c325cc450641359ecec4aa5b007cf83554b2bb5231a2b630e
font_02_sfnt_off00013709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13709 10864 bytes
SHA-256: 16640832011014577beee39ffca3544fcfc17da2edc8c6e7f13cf855b3d56506

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