Malicious PDF — malware analysis report

Static analysis result for SHA-256 01cec5e913402070…

MALICIOUS

PDF

81.9 KB Created: 2021-09-06 01:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eead0bd0fdc2239e79d2d6fd5ab1186a SHA-1: a6e90a0146f59570a1cecb4d954a8ab0451cd56f SHA-256: 01cec5e91340207031b2b93653e15c9636f6dc93275bb00867eee2a4679a214c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://smidgel.ru/uplcv?utm_term=technical+drawing+standards+iso+pdf PDF link annotation
    • http://sakuragiramenandsushi.com/uploads/files/jawipagekidiwi.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/7978633264.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16113773ea79cb---rixudirusemevukegefe.pdfIn PDF document text
    • http://fgosvo.ru/files/files/54045589528.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/kl81b5u9860qkbli3t3npin35p/pirudaliwapese.pdfIn PDF document text
    • http://sooclose.eu/upload/File/53734075546.pdfIn PDF document text
    • http://zzquansu.cn/d/files/vivomodaweruwapelati.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/64165883245.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/468fa4c0f7a179f49b92ef9fd6f6c20c/21550897637.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/79890941293.pdfIn PDF document text
    • http://webcertain.asia/contentupload/fckeditorUploads/organization_/file/87650348928.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/zobixuvavegukomugimoputi.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/dibakatinidapuk.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609410b3d522e---pagiziropij.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/08/08/file/durewiwemo.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/74856229471.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/55412126083.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0f5d3bb7c---73344306346.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/bosepoti.pdfIn PDF document text
    • http://klccpa.com/userfiles/file/96706938012.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/54463287761.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/95654547098.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfc0fef93c---xedafivolewufokobuxit.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD903 10948 bytes
SHA-256: 16f73611769d4810d351415b60ae9e6afa5ddcbbd256830e67d1f142b9244e1e
font_01_sfnt_off0000f231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A43 18256 bytes
SHA-256: 1a021d0b438777d56d2a1221269b0171acd3dbd737335c99c6521c0c9cc03bea

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