Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1ed39f04e5af11…

MALICIOUS

PDF

84.2 KB Created: 2021-09-24 10:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: da21b55390a58ab18710500d3b71b1e5 SHA-1: 1c90e41b2c2d3b4262c2710bfcdc3a4efed2dc9c SHA-256: bf1ed39f04e5af118f0328fa586786cbba8cbcd65d22063c8c1297ed5797c108
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised websites or disposable hosting, suggesting an attempt to distribute malware or phish for information. The presence of a 'download button' heuristic further supports a malicious intent to trick the user into downloading a payload. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://synerhu.ru/uplcv?utm_term=tamil+dubbed+bluray+movies+download+1080p PDF link annotation
    • http://quartierdete.fr/uploads/fckeditor/file/netixoliwuwopapazi.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/5130935942.pdfIn PDF document text
    • http://cahayamimpi1.com/contents/files/75500528694.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/buroruxixozomuvifuba.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/fae8e0b68b627711ac0f012b71fff746/77274453082.pdfIn PDF document text
    • http://ros-audit.com/i/up/file/46117213539.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/kasonufowuxirazipuvejinek.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/13344656802.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3fc413526---zedinojozamak.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/44984086547.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1630731695.pdfIn PDF document text
    • http://timebymtm.com/upload/files/xibexa.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/80913428943.pdfIn PDF document text
    • http://machulski.com/public/file/19757823456.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/87626386550.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-23-19-23-22-32.pdfIn PDF document text
    • https://eurochen.com/UpFiles/WebEditorFiles/file/kenid.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b33f0f2e8---21938961579.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/jibevudipapaxawiwibopa.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/74001679710.pdfIn PDF document text
    • http://qwerty.pl/_data/file/nepuvafawakevujok.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/lunuzogovazewama.pdfIn PDF document text
    • https://tigapilar.com/upload/files/86332600159.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/tudid.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/90122571514.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE309 11308 bytes
SHA-256: 5fad337d38353583b15c25070f0e7cf5298bd07eda6e49bec333e5a4d05a81a0
font_01_sfnt_off0000fd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11579 17692 bytes
SHA-256: 61aabebf6d86e3ffe657d731d00ecf26348d16f299a70dd3831e50a05d8a5b5d

Open this report in the interactive analyzer, or submit your own file for analysis.