Malicious PDF — malware analysis report

Static analysis result for SHA-256 330a0e4f74a17779…

MALICIOUS

PDF

150.1 KB Created: 2021-07-08 04:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: fe516141d987b69517f9219cfcfece41 SHA-1: 3180548ba7a288486d8b60d889de41dd94705fc3 SHA-256: 330a0e4f74a17779e5633b1430511c68dfb7f05383c7ff380fda6780ff08e21a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of phishing or malware distribution attempts, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9246

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://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/04073a094bab14b5b22a1b54e41490bb/77128766121.pdf In PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/40854885722.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/bh7vnnhfo9e8lgvfr59pkkasv3/zilemixaxakofipi.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/d9r8c8o3bf4ldgo60oaosl2tc4/xijutekuzojatutakibunegof.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/kejowupazavogidojosi.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ul40se59tv6ablukef4vi3kdbp/10465236879.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/lobefupizolikoweguj.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e7b44266e---1662152009.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f2c31bdb0---61612025504.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/23794827043.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/gagilizukisire.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608303d80e1a6---14867619956.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f1ae863ac---58940062505.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/a60115a7f98138ea23353e5fea514d8e/joriparodowasegutonuju.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/63691351552.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f5b10e89f---kunepi.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42e3263e28---71551838465.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/oiarudp3jb1ukpnfbjb8h44mo4/44050987879.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/dizajug.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/ganegowafabomukavil.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/dopinugutupemirel.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609711289559c---norawil.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/a8fd0534edeed15439a4fd9630d55c2f/29609698311.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aad87716ec9---36123672142.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/77387170181.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b8591db7b3d---80957111536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=elbow+extension+goniometryPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBDA 18552 bytes
SHA-256: a6b23e3bf39454560b07f5c3038d902d45e535605c0ef877e8898e16eaaea007
font_01_sfnt_off0001fcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCC8 10712 bytes
SHA-256: 5087c2487f246011479e5da4b5ab298c46002b4353c2efd09e266a69addd9654
font_02_sfnt_off0002156b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2156B 18032 bytes
SHA-256: c9ee97d9e73c66aafa0fa722326efd5aeb5ff97e6638077ea2a18c4ed486c658
font_03_sfnt_off00023206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23206 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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