Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f40c20506c63f2…

MALICIOUS

PDF

71.0 KB Created: 2021-09-06 08:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: b60123298742e80215f782c51bed4b67 SHA-1: 998b9e61728fe5ef7ea3bf93cde31e6f62878a49 SHA-256: 71f40c20506c63f286da02d466a92b85c73f8b87dcbeecf51a943132a7eeaf14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pistant.ru/uplcv?utm_term=subtracting+integers+coloring+worksheet+pdf PDF link annotation
    • http://nano-vip.com/ckfinder/userfiles/files/77951911506.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/tesepexelulovebisuseneni.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/27160262.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ba846ad38---38405031429.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/zatekeb.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/70647616008.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/b887a68b3185fc483265c017beee70d7/lezuzi.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c876f6e303c---dovuletoladimelujakugogiv.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086386f3966d---dijetidu.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/kapemupovibodisagelokul.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210901160436198.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/79f3d1640e30f4825112264f4f596783/gakoroforidadukasusuzafe.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/9m26jpplv501a7iep3rdrgu4h0/32966575594.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c38dd31de2---70001868164.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133efa029e20---menidevonudigusoxoliga.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a6178d217ad---mimotenetuwadizanavoz.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/96802231731.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16117459e2b19a---voxubojevunefelalozipis.pdfIn PDF document text
    • https://biocoils.com/img/file/xutukedidemakaditigev.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/43531784741.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/76535322217.pdfIn PDF document text
    • http://richfield1960.com/clients/865265/File/63365225753.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c45a8ad8ccd---75873602825.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/pexubejirumosuzibobin.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C9 15036 bytes
SHA-256: 716a746a9a41e777ac2981d9772c91d11030c1f6ef5774e8556fc79f03ef2e40
font_01_sfnt_off0000db9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 11392 bytes
SHA-256: db33c0227fc3fffcb36e99b9342ed3266c3fde86f359965f663ca48c6f24ecfb

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