Malicious PDF — malware analysis report

Static analysis result for SHA-256 92963452f682ac17…

MALICIOUS

PDF

74.4 KB Created: 2021-09-10 10:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 15bc853f3546e1723e8e5a251c3d2965 SHA-1: 40513c1372f507bb898b010d151f482e5c386a9c SHA-256: 92963452f682ac17d7af566d7b4c52357c409dfd7bcaaae1c768a0335b6d4db5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing campaign. It contains an embedded JavaScript stream and numerous external URIs, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to lure users to malicious content. The presence of these links and the PDF's structure indicate it's likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=friv+moto+x3m+winter PDF link annotation
    • http://savvyais.com/userfiles/file/zosoxojofezowibusajisu.pdfIn PDF document text
    • https://photojet.bg/userfiles/file/niwovugod.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/33058618834.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/8717598836.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/89061699904.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///86448838800.pdfIn PDF document text
    • https://codefon.hu/js/ckfinder/userfiles/files/45056746239.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/17232703013.pdfIn PDF document text
    • http://ke-sen.com/userfiles/file/1631144850.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613688e4a08aa---27015750960.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f733cea6d1---fisifamofab.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a8b4cc20b---55555998370.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/jevomowunazugutapeju.pdfIn PDF document text
    • http://vilniausgreziniai.lt/userfiles/file/sesenirefinexop.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/73846307725.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/femewunajivopuwikupirur.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/58010358674.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/202191747549343.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/27861724541.pdfIn PDF document text
    • http://qcfloor.com/userfiles/file/dixusadosagimu.pdfIn PDF document text
    • https://hssanesteban.cl/files/xubabaxewazexa.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613343a475e09---mupemobe.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/8285903192.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613096b40050e---wunupekifiwizuvamedula.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/73828554976.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ggpkgdvqim96tdvtt8aspq5s6c/2848843612.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/36302646696.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_off0000c201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC201 16848 bytes
SHA-256: d956c6cd10092235e17d0a34b1389044253cd1380911c685779c596e92076ab8
font_01_sfnt_off0000ed0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10523 10296 bytes
SHA-256: 0b823230732dc817f14dc237f2c381c3e061c4db6390519c5094cb787b8b0de0

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