Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e62175361a9783…

MALICIOUS

PDF

70.2 KB Created: 2021-09-11 23:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: afcb7a359a80537d875a95b221d5763b SHA-1: 3d57933d81f535b998b3992d5948cbb914ffbd3e SHA-256: 59e62175361a97830f3284d039547612b660989261f1d0a06bea3b92ab2a55ab
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The embedded URLs, such as 'https://crewmak.ru/uplcv?utm_term=techbigs+among+us+download', indicate a lure to download potentially malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

Heuristics 5

  • 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
  • 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://crewmak.ru/uplcv?utm_term=techbigs+among+us+download PDF link annotation
    • http://cu-mbc.com/ckfinder/userfiles/files/12065891951.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/2715591616.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/46080713334.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/33251783069.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a172ee3de7---48898688117.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613495fcbfdaa---rimikejupidelekowezu.pdfIn PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/gonimubafokiwaj.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136eebdf02b7---1569979727.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/dagodikovamudivokamud.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/darovidaxetuxibetif.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/9461556414.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/49971385208.pdfIn PDF document text
    • http://thecuriosityshot.com/medafogodelediwi.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/sotowikowamuxumodazufiki.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/46092122728.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/tagopovozak.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/92310292049.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613452b05ceb9---sosaxuf.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16139389a94de1---69901012060.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/2125262432.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/wudutipulisozerupase.pdfIn PDF document text
    • https://termofriz.rs/files/10998927871.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133413865368---lijulizoxanu.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/89eb80ca03f9d3b09fbef5787b78e673/difiriwetopowezi.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/210901111614038047cesc0.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/pafasisinijif.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD802 10908 bytes
SHA-256: d0efbc8e51041ce3b85d1514c96b23ec0d5b8c2cb83d96fde01267ed9c5a6f71
font_01_sfnt_off0000f0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1