Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b2e11384d2fc4d…

MALICIOUS

PDF

223.2 KB Created: 2021-07-05 12:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: df55aaf5b67c537231d023f5697c84ac SHA-1: c3bcac1b01454dc89eabf1a169d1224e903e61f2 SHA-256: 00b2e11384d2fc4dc2523939f4f944a1fa1580ec4819c8f0c60cab416d40f2f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous links, with a high-confidence finding that several point to compromised WordPress upload storage, suggesting a phishing or malware distribution lure. The document body is heavily obfuscated, preventing a clear understanding of its specific pretext, but the overall pattern points to a malicious PDF designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6884

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e324ee6543.pdf In PDF document text
    • https://oklogistic.lv/upload/file/31925023312.pdfIn PDF document text
    • http://beta-rc.com/upload/files/9701042984.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e13d755c40---80598997796.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/a01a863a93e43e2cccdc281f45bcd146/82186507750.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/68174931533.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/65803614495.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160854ecb014c5---15006310108.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/110704287.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/wowatafigatur.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/9fd10fa962478c62abb5e2a3f93204e3/nalegogimig.pdfIn PDF document text
    • https://bursac.net/userfiles/file/89070651203.pdfIn PDF document text
    • http://fitviewer.biz/files/file/wesisotinobumijovif.pdfIn PDF document text
    • http://cutencuddlybreedables.com/_images/file/fomopiluzo.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd200e16ea---96210422221.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160be0d83ba6e2---pazobojaloledasogubi.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/75447743618.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/91v2pqmscvb7n3i6kcob8vv24g/zojidowozav.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/9f6f6ac1b6dc9ca6195f0c5d2b7f7c59/zerelegekupedo.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/lixuralegedoti.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/28688486333.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/degomixatim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=royal+letters+copy+and+pastePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00017dd2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17DD2 185396 bytes
SHA-256: 9485a21bc866a6f197c018f5dd0f9977eaffbd02aa3e340723911da8ad8b8a7f
font_00_sfnt_off0001011b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011B 21472 bytes
SHA-256: 609f91afb43bf0e7ee872323e70fc273c6173a67b3329a61e9f88e6c0108791e
font_01_sfnt_off0001377e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1377E 16112 bytes
SHA-256: b571339faea2cb97d8cde8302d6d527a77dd1eff7e5a04c025bd69dbe6125fe9
font_02_sfnt_off00015e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E45 984 bytes
SHA-256: 3f6169bed47c2a3237fdf18f1b5257a177d0d2adc7428dd5ee1729e63eadeaa7
font_03_sfnt_off0001657c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1657C 10572 bytes
SHA-256: 58857104a734ac8e8596f5dd027a3a6a6f0ebb53e94af60f4599e8474bdcebea
font_05_sfnt_off0002e896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E896 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_06_sfnt_off000300a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300A7 48752 bytes
SHA-256: 47f33a31fe800c0a00ed88db6b52a8094b06ef04886061900efa6e84c0c878e9

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