Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a558fa0e9af32c9…

MALICIOUS

PDF

86.4 KB Created: 2021-07-04 18:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5d3bd2eb48cce5f8356f2d162a1ef7fc SHA-1: 443b2a74857207aebd2ba8994db4e21b2243085b SHA-256: 9a558fa0e9af32c9447e44021a705f33d50ff0ac216a5777fa364903d88089e7
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. It contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating it functions as a link farm. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=the+federal+government+can+levy+taxes+on+all+of+the+following+groups+except PDF link annotation
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/b5737251d9978e83c129bfcab6022c0d/8290923539.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/romoroxekemas.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/gjc812objnfcfk93uh1po52oob/98674242092.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090af1923296---depexurogekorodesagoja.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a750fb6cd3---39133914651.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/i8trknpvvr7mglk17eabuahgol/pajarugukufudawufabiporuk.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160895eea71396---welotogovo.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/23064722985.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/nsp1bl0g1gjv3svmacra22ppo8/kifanunemok.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/gumig.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48583977139.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b16821c3d---gazanekem.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/7570773653.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927e9d3f241---95349923662.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607238531d19a---72280489404.pdfIn PDF document text
    • http://bethanybaptistcolumbus.org/clients/75549/File/49873165158.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/nuvedomu.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/kasoli.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/murifanabifojalatelex.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608e029a14e5d---76140362866.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57ff99c6f3---91233019770.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/4349994657.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_off0000ec51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC51 17200 bytes
SHA-256: c0099d46cedd8c20f39a90968e52b334b1898a930bafc329584bb6795f269386
font_01_sfnt_off00011982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11982 11500 bytes
SHA-256: b26587c4c18ad07206ecfbc5d7dd1e0cc8baf71e48ce514fd9835d103cf1cce0
font_02_sfnt_off00013471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13471 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.