Malicious PDF — malware analysis report

Static analysis result for SHA-256 1146d7a8021c26a9…

MALICIOUS

PDF

71.8 KB Created: 2021-10-09 14:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 83909c03165488271f6273f40624e8ff SHA-1: b926578179778e4052d8bfc7a7872fd44c97eae2 SHA-256: 1146d7a8021c26a9d6ac4109f1e8c07ba5c685eaa61fa082a8247357e67c80fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 or disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_URI' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this. No scripts were extracted, but the overall structure points to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://ketchas.ru/uplcv?utm_term=dubrow+fusion+diet PDF link annotation
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/jegedatodalubodepanu.pdfIn PDF document text
    • http://cmtsport.com/pliki/93600858914.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/jexuzenifotepaluleza.pdfIn PDF document text
    • http://infas.cz/images/wiswig/file/83125855242.pdfIn PDF document text
    • http://teplospectr.ru/images/files/ponizetagugulinodanuvu.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/31092475079.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/falefazilaxasosi.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615e2c2534fda---45009984911.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/51395387329.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/31098726565.pdfIn PDF document text
    • https://tahitotfalu.hu/ckfinder/userfiles/files/gujup.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/wuketitinejifidaviv.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/33061640336.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202110021547254286.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/rileraxap.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/28748007680.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16130d96f7f5fd---diwafuwexoma.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/9840078259.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/96317919437.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/55664426952.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/75669a191a2eef3b880d768aaf757dff/95101659583.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/miginugepob.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/99fd9a856b84f6768de0245217383a94/zofikekozowideduxi.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_off0000b878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB878 10464 bytes
SHA-256: 82203f24364e980e1b59f83edc225f1256d4d3c88031d176a52955f47505ca5b
font_01_sfnt_off0000d06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87D 16080 bytes
SHA-256: 9420e0cb16bc0da983cbda724b0827023cec4f1bc5f8618b04615ebbbaaf5b47

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