Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ed71946f5e04df…

MALICIOUS

PDF

73.9 KB Created: 2021-05-26 19:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d2216b2933f20c55780773998a632826 SHA-1: 4a690f6c78a4e7eac59e7e6b74ca02fd12ce561d SHA-256: 49ed71946f5e04df94885ea71e8d87f6c64381940bc25f83e63a49421177364d
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://krisoc.ru/uplcv?utm_term=how+to+fix+the+led+tv+on+wall PDF link annotation
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/f5564f6b171aa3ee08bb7180249a4921/xezimirupavogusedot.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/4ffa7285022f45a412942943dcc50296/nedozuzoxofafiwelusetoso.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a18b76e7683208f22b9115b694a82780/46057952499.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608b11189b1d0---55116937917.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/dubutobixunakuxonedi.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c9d0e3b36---72907685655.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160790e2ee4fe7---sunudawosakekasozut.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/850dr2qacrpo1nquhcti1lsa46/56923339538.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaa6476654---77603752622.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/rijimumajabe.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/dc1bf0ee493559160ea0d12b3b89c288/mijav.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/5a695019a8b4912163a8b30cf7590eda/kejexemixigeregen.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/64c49f36f31d6048972b73819d66cf96/jukedolug.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ea74951c2---48583122575.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/3ec062765b9f425928fc57588f0e08b9/guzowowedixole.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c45b5e67f2f4c4e0c86eb3fa8d4141ab/49203851501.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074fddbdc493---soruzuxojojipuzalefujebu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC982 4904 bytes
SHA-256: 98bb1ecbe0749557ce5f6ee88aa6841c77ecaae8ca232a60421de5b19f7b9ed9
font_01_sfnt_off0000da41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA41 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000e2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CF 10072 bytes
SHA-256: 5926e0761cf4070fca9e1aa7dd5955f42a2110e613a4f7df2bea94273303e471
font_03_sfnt_off00010563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10563 16060 bytes
SHA-256: d78d7cc1a68daa951b4fbccbcfb906d5a08ad384f187125596154666a45abe72

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