Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a775f9660d8a119…

MALICIOUS

PDF

83.3 KB Created: 2021-08-27 15:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 75a3194139bcbb9bebb8588208ed33a5 SHA-1: 6e2f118961949fb1e763217e861ba7f919467e7b SHA-256: 7a775f9660d8a119a920cd182f2d5d27ce6ab641615ecb88cb3ef4e57e79132f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF's purpose is to direct users to potentially malicious or compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://ehomeforeclosure.org/images/file/jezenalokonumego.pdf In PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/9d18189bb429cdd502accec54cbd2aea/63871782087.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/muziwozobomumavenitex.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608372f7733cd---74719217786.pdfIn PDF document text
    • http://residencelesaline.it/userfiles/files/penuwifivomoluj.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f56d076100---66751824978.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/jilewufofaxuzer.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/da773dbb49c23fe839336ee04795d40e/wubujumej.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d63174634a6---58152587271.pdfIn PDF document text
    • http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/67265398269.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/mulek.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/5obfv993vocde7lju4aunj2jba/62333529424.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-6-24/20210624214354758464.pdfIn PDF document text
    • http://sms-dk.com/FileData/ckfinder/files/20210819_789B92817C674857.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents//files/misatibuzela.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/demewamirid.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/8684sjj3kjvb1d0tuc1mqrttaq/kegoza.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ff0b35421---fifuwakijajimudib.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/pupabibe.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/divugo.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/korudipofomunipagobazixa.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57b6717f3e---7337262387.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/gfi699o4i617jpoupaatm6hitv/96926101567.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/konozimofogafirekiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+determine+net+income+from+balance+sheetPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD82 10956 bytes
SHA-256: 398d2592f8801b16800b1cdc1dcef1f9d68d013ec9bc4011035a4b99802efb4e
font_01_sfnt_off0000f6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B9 18580 bytes
SHA-256: 466c4badd041539727180f8469213d4e355cf3b280c9a6b74a96de3386730985
font_02_sfnt_off0001271d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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