Malicious PDF — malware analysis report

Static analysis result for SHA-256 34eceeaad0dcd081…

MALICIOUS

PDF

73.0 KB Created: 2021-09-14 01:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 061a1fccc2719021509a107a3bffd358 SHA-1: 116f866de91aeb66a473c3f6e0d64bcb597696a7 SHA-256: 34eceeaad0dcd081f79acbf5b1c357e35fb9b5f4ac8fe332051d00bb383b527a
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The document body was unreadable, but the presence of numerous external links and the overall structure strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://nazragame.com/calisma2/files/uploads/56667663668.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613092c598e37---xunuseruxozuzawefujam.pdf
    • https://vhcvietnam.vn/ckeditor/images/files/pugepuj.pdf
    • http://elisa5888.com/shopadmin/upload/files/mexarovujixonafeze.pdf
    • http://educaholistica.com/resources/img/imagesck/files/56091907473.pdf
    • https://kohphanganhotelandtour.com/userfiles/file/68817555552.pdf
    • https://emilline.dk/ckfinder/userfiles/files/juboledinunatu.pdf
    • https://pmsp-me.com/userfiles/files/49908748582.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/161391e1adb949---12745226738.pdf
    • https://waxparadise.pl/userfiles/file/16255896594.pdf
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/begoxetovabapone.pdf
    • https://metrosecuritynepal.com/assets/userfiles/files/milupipeju.pdf
    • https://mallarpurnaisuva.org/go/file/65682199747.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/pjot3pqom6kc3a3t83uurntue6/41268034390.pdf
    • http://leprofit.ee/cmsfile/contentfiles/27481968507.pdf
    • http://thuexe7cho.vn/upload/files/purafep.pdf
    • http://www.binghan.my/userfiles/file/donoxuzaxoveve.pdf
    • http://s-pack.kr/userfiles/file/20210908023037.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9433e12a6---fotijalumaganomofefuxaxu.pdf
    • https://yenhuy.vn/upload/files/kikuzuregabususorejojexi.pdf
    • https://mimpiindah88.com/contents/files/55341407627.pdf
    • http://hum-lucknow.org/test/fckeditor/file/69957033830.pdf
    • https://sukaunited4d.vip/contents/files/kulotu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=dua+to+marry+someone+you+love+but+parents+are+objecting
    • 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_off0000bc00.bin
eacfec5dfea8ed5b2b1382b862521ceff834cd457f36b7bde05c7399c903c70a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC00 15452 bytes
font_01_sfnt_off0000e34d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 16792 bytes
font_02_sfnt_off0000fb64.bin
24bb97d9c019d45bf532b12c2147b8c0c72370edf417eb4755a9cc5e48b8597b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB64 11268 bytes