Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4861275e4e088c7…

MALICIOUS

PDF

73.9 KB Created: 2021-08-05 02:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f12d1e5bb475a106c80c9cbf60772f87 SHA-1: c13b4d7d0f9f52aa42af4af3c1fd6384211e5568 SHA-256: a4861275e4e088c74d62241d371a236b238edc1fb1a67d8b5204e3b9d9941869
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support the malicious nature of the file, likely serving as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pistant.ru/uplcv?utm_term=metodo+de+rufinii PDF link annotation
    • http://biotledlight.com/userfiles/file///kijowuw.pdfIn PDF document text
    • https://qnzar.com/files/84883620198.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/fipapesidakokeletula.pdfIn PDF document text
    • https://cet.sk/res/file/kasarozulemewojebesuxig.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/togixuweso.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8b157d9e0---ginusesisixudisopatat.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/8cff52d8c88eb1573abbd849c55bdc5d/xalesataw.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/20949677753.pdfPDF link annotation
    • https://bleikss.com/userfiles/file/41725133332.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f82b7e43f---buxovewibipokivumof.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d82c63f1f5---rezapivaso.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c39cea844ae---87246147864.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/penuk.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de62f15bd8---jesituv.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/92672066567.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/174558122260a6ce0b0755f.pdfIn PDF document text
    • http://www.heksan.com.pl/file/sogetuwedeb.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/058e0e0f3a9a62e7625b3e4bd97351e9/waxovor.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/p2ujrr6qb9ui2q6tgargb6r37g/laridudozujikiwosifa.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/33004764944.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160e796ec362c4---97027669572.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_off0000bc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD472 10064 bytes
SHA-256: 5941c3e9914bf8705f07fe94a6a4c4cefa569aa19ede09aefdbcc6d387230d75
font_02_sfnt_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 18636 bytes
SHA-256: 3db8962add2185fad445005743711da3f49a2cfaad03c58045ceb621bcbcd107

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