Malicious PDF — malware analysis report

Static analysis result for SHA-256 60560024e5f2a39b…

MALICIOUS

PDF

78.1 KB Created: 2021-09-16 14:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f3c30187de9a4c89e601c917fda66a62 SHA-1: b81fc9455d2ff7c9ca93e59ac006fe98b7adea49 SHA-256: 60560024e5f2a39bddf1f881d1f2ca78ee295abe4fd88f40a3a5873fb1f52a61
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of numerous external URIs and link farm heuristics confirms the attack pattern.

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://coretry.ru/uplcv?utm_term=n64+rom+banjo+kazooie PDF link annotation
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/lomisajojolik.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7284d432c---kupolubogimu.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/53418883992.pdfIn PDF document text
    • https://ra7a7p-h3ba7.com/contents/files/megarumu.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/23548790628.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/pt408ufh73gvr04mnjivd40v50/givetazekolivutegifo.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/2446534335.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/94689860750.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/xukomatudupid.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/zizuvaru.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/ragor.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/73583117745.pdfIn PDF document text
    • http://aptekadc.pl/userfiles/userfile/32791943351.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34596606997.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109121322225326.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/muxiniwadizojotukoj.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/65251904217.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/finabaxagemev.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142044ddf31f---guwifudejovijuna.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/miruxelenovumonapuvovoz.pdfIn PDF document text
    • https://cakkue.com/contents/files/55797354121.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1630650836.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613424a506348---dikifoxanenenatonopopulu.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/66858152357.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/60701025482.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_off0000ce44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE44 10604 bytes
SHA-256: cc73b035210264e2d470732240242a1e4f3e528c7937269a1522844a97108c45
font_01_sfnt_off0000e686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE686 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE98 17092 bytes
SHA-256: 0732f5ca1069616b3dc82c399313df3bf3f9e1498e1836db0677de9af6ddbdba