Malicious PDF — malware analysis report

Static analysis result for SHA-256 7efaf5adc225689b…

MALICIOUS

PDF

90.6 KB Created: 2021-07-25 02:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 521f4c3ad41997e0c14ceeff78053c8d SHA-1: f800e5527a4595a12ec2cd480756af36d7ab2c30 SHA-256: 7efaf5adc225689b37175819860b28d216c67efe673c984b1ac2bec1329cfe43
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://toeicspeaking.net/_UploadFile/Images/file/80644187712.pdf In PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5f6633465---relujemuboka.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/6304597c201bb095e700e919544d6745/92526860097.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/osd910i61tniteimfsh5oafmbv/dutevosizawobisavow.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/fafulip.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d57d17c7be---nubijitasof.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/27989291268.pdfIn PDF document text
    • http://valeneighbors.com/userimages/41641335094.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073204c28597---56163281080.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/27428562765.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/lutukaxovur.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/2072341b0fcaee5d9dee7ba2108e59fe/karovedojediguwoz.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/cc2cb1fbe47cc946dba0fc022502f0e6/vodowemivinud.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/wemipezegogavepadotis.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfb268a47c---85345237283.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e57a110a4dd---garamawowofijewudojexozo.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/kabozedu.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/97336757315.pdfIn PDF document text
    • https://securitydm.com/slicice/file/wurudobalumokesasavuxibo.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/e9675c37dafc1f8cb466b01f98555046/xokivixozonotutosuf.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/e8fa2f3fdfe46a9b21e5d410f23857b5/fisajuwasokuduvo.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c439af1b2f0---98615788732.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=marvel+spider+man+2018+apk+download+for+pcPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 17656 bytes
SHA-256: 57a38649c347d582af16c4033027d2c699813af747a25fde70f7fa189c6a02b0
font_01_sfnt_off00012638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12638 11420 bytes
SHA-256: 2a3c3605b263d024cf0154cf9163ea43b33351c83cbc41c01e3df6e78fd57c8a
font_02_sfnt_off00014141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14141 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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