Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c805323c094350c…

MALICIOUS

PDF

101.3 KB Created: 2021-06-30 21:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 472445971d91e9a5c68a964da4d7eadb SHA-1: f6bffea3b501cc2fd2e422cf0db26fb2046796e7 SHA-256: 2c805323c094350c67593295c09b330100c0fb5c6863b0ced01e263661cdd72b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for malware distribution or phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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 http://auto-spec.ca/fck/file/piguwiludaxemema.pdf In PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/9ghsn4vcdv4mqcr7a7ncpu348n/zutolosenavilerenok.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbd99d3355---42740992485.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8c14096de---83015156685.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/81831736709.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/74694951681.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/93487163084.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/7581822720.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/cj7922hsphvgd7tc2oc0v6ldse/11476438678.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/bda9b9d26acea8395a4914afa56ba947/44928323832.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/lokawibepogerig.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160981fc863f74---nivudazewig.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/3514298800.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4a4e7ff40---vinofi.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775b4fa9208---vutofije.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/toraxisasulevikonejoxen.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/43593694600.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/9e855e0210aeec1db60daa3c3dc1cee4/14314387302.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/288k1ajnks6q8sms952emhlkir/31207044117.pdfIn PDF document text
    • http://cnp-inc.com/ckupload/files/45812151737.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/7j7n2l7efsukm5nciv7no8cvdp/vekaxazoju.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f02f84cdb8---96095130627.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/99402284348.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/49837ff8e61bc126142ed02fef34bb6c/98536802073.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=apk+sonic+unleashedPDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DB 2792 bytes
SHA-256: 7419ba330ce1d48c6b7894caec2c30ace00e83e5ecbee3f754c36674cef57f39
font_01_sfnt_off00010ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D4 20756 bytes
SHA-256: 5d8a8cd8ae26915fdbea22e077e7f8c2301f00b3214291673c9bfef3be18b0f2
font_03_sfnt_off000159bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159BD 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_04_sfnt_off00016f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F03 10588 bytes
SHA-256: 88413ae54f0cf0dad371ffa580dae06dc65922d72e067041e3707da6f8ad02f3

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