Malicious PDF — malware analysis report

Static analysis result for SHA-256 8768a444b2763543…

MALICIOUS

PDF

104.3 KB Created: 2021-02-22 09:26:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f1c9df2fad17782b2fa74fdd188d9492 SHA-1: a5750f51639293f3000d952a98200854c521c727 SHA-256: 8768a444b27635439c17898daa4a06856212ef82a03e84ee6b19e8049d14c77c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to the URI, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://baarspo.ru/123?utm_term=who+does+klaus+baudelaire+end+up+with PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418370/normal_5ff05dd6f07b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415327/normal_5ff3af68cf8ff.pdfIn PDF document text
    • http://adyga.site/melonabibijigasdgsdq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5fc9491fca0e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427095/normal_600e550dd0e86.pdfIn PDF document text
    • https://cdn.sqhk.co/wukikanas/hhwghl7/guidesman_rechargeable_flashlight_review.pdfIn PDF document text
    • http://simabozarulo.iblogger.org/who_makes_blue_iris_software.pdfIn PDF document text
    • http://eslife.pro/why_is_chapter_2_of_jekyll_and_hyde_important07muz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449405/normal_5fce718cb27f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368763/normal_6000ba899c4c4.pdfIn PDF document text
    • http://info-pages.ru/hollow_knight_how_to_get_double_jumpy2jfe.pdfIn PDF document text
    • http://enots.space/usage_of_semicolon1zibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404523/normal_602615bf151c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://dufuvebali.rf.gd/dexa_scan_guidelines_uspstf.pdfIn PDF document text
    • http://gatoruvizuzil.epizy.com/how_to_sync_itunes_on_ipod_nano.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/dudumevojafuripoxupemati.pdfIn PDF document text
    • http://larisakexifa.epizy.com/grade_6_math_worksheets_ontario.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12831 5356 bytes
SHA-256: 616228c2de358ef5a45dd94813121887777428f14c3c8d85543ef0eeb9c8a67b
font_01_sfnt_off00013a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5F 5852 bytes
SHA-256: 0460e4b819836684ee646564f23d3767bfcf5407a742f126e14b557faf704447
font_02_sfnt_off00014916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14916 11004 bytes
SHA-256: 9837099d574e53e4d728616cfeb6a9477ad49a791c24d8c308fb5a948ba0d480
font_03_sfnt_off00016edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EDB 17464 bytes
SHA-256: 140c95180619a399f8c827efe9481150c8d09347bbb5075f3282741151fedfda
font_04_sfnt_off000188fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188FB 2004 bytes
SHA-256: 2e26f8f2edf0ab4a481426fb6ec8c0d485dd17fce6d182c1a140fa674a3f2dd3

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