Malicious PDF — malware analysis report

Static analysis result for SHA-256 59656d7c148ffd57…

MALICIOUS

PDF

75.4 KB Created: 2021-09-24 12:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b97d2e41610f2dbb33ca14545c352fe1 SHA-1: baa0161e96633a64f0e8cd1b60319aa513a51191 SHA-256: 59656d7c148ffd57e864b24a096a35731da138150512a4afa9edbcb0bc559f70
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure indicate an attempt to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://beauty214.com/uploads/files/202109030111131745.pdf In PDF document text
    • https://lose-weight.tw/upload/files/fotujozasiniwudoki.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/9676776028.pdfIn PDF document text
    • http://citlak.de/admin/UserFiles/file/xijobodivetalamaboni.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16145e3f001132---lumujuxebifekine.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/rukelozef.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/31350464802.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/gofeker.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/97345824952.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/kizobaxabunekatisali.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/zizufarulewadeno.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e9145ab70070131f13bfb5d2aff5ea01/54698352850.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/295545af4fbc9b6158a5b61bde4a44df/20780283785.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/47977781475.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/60662711911.pdfIn PDF document text
    • http://theponghop.com/upload/files/repojifulimew.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/zosuminizupemekiwe.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/rovajelud.pdfIn PDF document text
    • https://defrokatilai.lt/images/files/84454356807.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/5368492051.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/zarevijanorepadevapivub.pdfIn PDF document text
    • http://plaschke-partner.com/uploaded/file/26884259838.pdfIn PDF document text
    • http://haphadoor.com/upload/files/93950703310.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/vunisesazem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=material+design+full+screen+dialogPDF 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_off0000c17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC17E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD990 17540 bytes
SHA-256: af093680ff15ed434281d93a29d8b3b803677dd286f3dc61b9192bdb052790db
font_02_sfnt_off00010779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10779 10744 bytes
SHA-256: 13d05d767ab13af178316308906e420ee1c7844eee1c6e4810d9e309c1dae24e