Malicious PDF — malware analysis report

Static analysis result for SHA-256 119af1b2ae799d66…

MALICIOUS

PDF

85.8 KB Created: 2021-07-07 09:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5ae13df1545fa7d5dee1faa475a918f9 SHA-1: 031091124268ce35b8221c98512dba513a370e38 SHA-256: 119af1b2ae799d66431537a3235f3ed67b9893f93fcecde264d013ebf51604f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external URIs and links to compromised CMS upload storage, suggesting it is designed to redirect users to malicious websites. While no scripts were explicitly extracted, the PDF structure and link farm nature strongly indicate a phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://garglob.ru/uplcv?utm_term=the+financial+system
    • http://micronforgacsolo.hu/UserFiles/file/vunib.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160dbbe108c005---13986752291.pdf
    • http://ansonseatery.com/uploads/files/lulajudezosolu.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e7b890ef7---zadufidurovulo.pdf
    • https://motelandratecuci.ro/userfiles/file/gefajipoxupoxobut.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607780e4ef2dc---84839611295.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fd25c4e1f1541860c329b54cfe9c4b4d/rasemufonadifijedemivon.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/p05s9r5c8i5j66abo317ts7s8o/46805159891.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/l08qtih6hrgdhr72j2psindhat/65665489222.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b971a4326d7---petowibokedopoforez.pdf
    • http://dijladentalcenter-qa.com/userfiles/file/simuxorazupav.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/82166aa728f74ee30985fc4441de7956/86642743243.pdf
    • http://sjar-tech.com/uploadfile/file///2021062514043136.pdf
    • https://tbsva.org/Upload/files/20210703024354.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adba86d1f87---61384897927.pdf
    • http://dulichtantai.com/files/uploaded/files/98280305365.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/5md7e11b2m8cahjhrpl9u8rnc3/mejexum.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/e80516ce2206dba57c158bed4d626f91/lefogalajorexeriperujuk.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/33a87b1329ed3450f86b554c78f21faa/xovuvirire.pdf
    • https://thaihoanghung.com/upload/files/35002726320.pdf
    • http://evolutionchonburi.com/userfiles/files/wibazasukizo.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/4ajkj1c4gui9q8v74snkc53l77/mekebun.pdf
    • http://geoodwierty.pl/files/file/39591843653.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6536bc6250---tunezugetexemezi.pdf
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/39f53a2d1f4982eb41d2ee327a971117/zobutemowaxutalusim.pdf
    • 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_off0000eef8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF8 16792 bytes
font_01_sfnt_off0001070a.bin
a917c82833c7f49a69dc616beb9413ee92ebeb4dab7f3415c3d17b9b94752f9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1070A 16576 bytes
font_02_sfnt_off0001325e.bin
704be5e0e52962613a077f33cf98cfba1f05eea43e24e29b2c402c7b90ec7249
pdf-font-stream PDF embedded font (sfnt) at offset 0x1325E 10456 bytes