Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab1b3c3d72cb19a…

MALICIOUS

PDF

83.2 KB Created: 2021-09-05 15:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0f08f914912caf350294a239decac485 SHA-1: d10b6006eb18503e6c9cf9808c02ba94425eea55 SHA-256: 0ab1b3c3d72cb19ad4c14762c6c9a9678a99b3c0d16e80fa677e2c33725dcf85
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely exploiting PDF vulnerabilities to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://bdaudit.ro/userfiles/file/58998968526.pdf In PDF document text
    • http://ankurgroups.com/userfiles/file/12841065165.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/24454741883.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/tifisisigogufa.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/papavinulega.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/lopafatazixekobotoselib.pdfIn PDF document text
    • https://mashura.co/userfiles/files/raleruw.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6eeab5db2---davewipemon.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3cd75d540---31369363929.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/23771580994.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/fkp6ourmh3m2i7esekphrf8rdj/vozixobe.pdfIn PDF document text
    • http://krzeptowski.pl/file/mivijasosesilonopu.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/c60db5c5de57ebe32c914d0df62203e7/zosiluvuni.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/lexuluvuxomuxowo.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/xitegelebitupu.pdfIn PDF document text
    • http://sushi-belovo.ru/files/jisejonitebizuxipesinufo.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/28385012929.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc37198af21---76881746889.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a821abda880---57240652300.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/75170071418.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612db8e1e263c---bipikuxebexowuremizisax.pdfIn PDF document text
    • http://palami.by/images/file/21618049793.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/90980326112.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=pdf+reader+apk+for+android+mobilePDF 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_off0000e266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE266 17404 bytes
SHA-256: 4d828dac93308b1eca4ac2f9968bd268fd101794e193d5f5f8c1eec195e6d8e8
font_01_sfnt_off00010f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F50 10628 bytes
SHA-256: 3a462708301270efa597acc9e0a63c10405f93a4a88c66f66eb15415528b1e92
font_02_sfnt_off00012748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12748 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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