Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2574485d6a3482…

MALICIOUS

PDF

81.9 KB Created: 2021-06-29 06:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5df325eb9b7779d3d355b5d309b7c943 SHA-1: a3fd6016fdf0a78f0067c0ccf02add7214e8b990 SHA-256: 7f2574485d6a3482315acebe7159fb5f8363a7b1e1c0f10e8c6a3594ec287f41
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to multiple compromised CMS upload directories and disposable hosting sites. This suggests the document's primary purpose is to redirect users to potentially malicious or phishing-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/2bb64d83d9170db5c4c1efe387ce2777/10147745935.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/m9hj7ttk28o2j1f6o1l27hhbh0/86521689199.pdf
    • http://penzionklara.cz/userfiles/file/sevaxuxiduretex.pdf
    • https://brothers-music.com/ckfinder/userfiles/files/84048855342.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/rhgr2knuhogj81q1n7jtmpafc3/kasamibujuvumejejezuxo.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160c53f866fa32---54205094880.pdf
    • http://smithmaloney.com/clients/3/32/32eae1a42220421eddab78da2f55685d/File/62566998068.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/7f447b1bdc9f56834d56d02446873a48/15713801964.pdf
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/37616293907.pdf
    • http://granite1962.com/clients/869125/File/wezogi.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5764af1a---begusekoj.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160827fb0b4814---rodosagoxatesitizebamam.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/2a5ae578aa801a31d1658f2558b091f8/gumetulowosepoxudemu.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7eaf0cbd0---48344909572.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/b74a6acafdbf851832b8e70618579ec2/41719873665.pdf
    • http://provia-events.de/pics/fotos/1/file/kixepabu.pdf
    • http://saokienviet.com/uploads/image/files/bikalifugitowuketanav.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/21t8jofv53j4l3d2u732un2co6/80546421287.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a93bf5cb60---katutogeguzatir.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607331c5ef02c---12864239098.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e2b0ef1ac454756428c620fd99bdf5c4/80644398896.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b03b83ac4e---41840013956.pdf
    • http://doo-san.com/userfiles/file/20210602172633.pdf
    • http://www.pattyn360.com/upload/forum/files/fopudizesil.pdf
    • https://condominiobrisasdelnorte.com/userfiles/file/50787169239.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+butterfly+lion+comprehension
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAC 16792 bytes
font_01_sfnt_off0000f3be.bin
cc176cca0ae48db82603be41f8ddb2a6ae3c32fd608f51d3ec243e81cd679cb5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BE 16860 bytes
font_02_sfnt_off00011fb2.bin
2d3904c3556f18a31767804cbd7b4daf351a5c79149c81522002f14e3918f01b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB2 10900 bytes