Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf066898e056a7e…

MALICIOUS

PDF

82.4 KB Created: 2021-08-25 13:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: da0f2c2441397a035ada23190c77416b SHA-1: 7fbb59d92f85413067554656f707a74f4023438f SHA-256: 7bf066898e056a7e7f40d9fc92e4f8a9104dac1c261782cc807e79058a18e520
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and the nature of the URLs suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f111f1cb6---sewenepixoforavuvoniva.pdf In PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/43603111716.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/43615667134.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/51452011438.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f328178129---64195958289.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105de21d521c---18387669431.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/dee9128b2e0d3714b6ebdfd56ef0d793/remijanudeb.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec115b9377---weladazor.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611577a4bbe0f---futifuvefovikamijezujo.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/6010960798.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/eoglevcusgg3kesho13fg9k425/lanuwuwuwatupavan.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/70639019965.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/ahoj40rnk52pf8ro8ivm8oqka2/guvuvirosixunat.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/selikegiwonumululamo.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/luwugekisegi.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/14291741085.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/56f31c7eec5746415ef36d70e99e57c1/lakanosugufazom.pdfIn PDF document text
    • https://sambelteri.com/contents//files/xogagaxividemebokef.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/17261406707.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/16532723772.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/gotasaxomawemekumoxodo.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/bbadb53344e3860f61ddb61294f4747d/78553895701.pdfIn PDF document text
    • https://oversaslogistica.it/file/25804895336.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=reversal+of+fortune+meaningPDF 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_off0000dd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD17 17844 bytes
SHA-256: 0151de5d356a40c15302086ed66f87a7e8da516e4427c3da44ce731af401c6cd
font_01_sfnt_off00010b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12366 10768 bytes
SHA-256: 21b2829b3c2247c9b47c1fd04aa7f59418200de64a6c5e1573e2f12e6d040e1a

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