Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f579c88f588dfb…

MALICIOUS

PDF

84.3 KB Created: 2021-06-13 07:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a44d704a51b2ef0dd6334fa33dd81d73 SHA-1: f067f7f30f8d2df919a195485e9282a624af0de0 SHA-256: 07f579c88f588dfb4142d1607caf9aee93cc98e9ba9c66429fcfa809a52386a8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware disguised as a file conversion tool or search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=best+way+to+convert+vob+to+mp4 PDF link annotation
    • https://dialogueinpraxis.net/files/docs/newofuz.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/ee46967248424275d543df7c5f29b387/ruwiwelodakiruneju.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bb3a6nl9fbcqhjca856gif1kq6/83300455323.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b46a64b439---bujip.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/60318009972.pdfIn PDF document text
    • http://bookblog.kr/data/file//files/pemugarumox.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16085fa7519319---55336325672.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/napulurubetojubu.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787fa1bd207---vugomuweviz.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf4d69f7e3---75124084073.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/54199609176.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/59407713924.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/xoxazaxe.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160819385c7054---jawesilofekebimixurizifur.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ad79ab53242782351c5b0117adefddcb/zojukozanozisa.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3ac77e461---gomeludofibe.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/057cc60f6e922bc264dcbe9366674983/67686756118.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae05072cc1---30927844006.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 2960 bytes
SHA-256: 3a99bfcc8a6322cb1f5d9dd0c76c95525b0630114fc12c53a342d41e6b6e0e01
font_01_sfnt_off00010645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10645 5576 bytes
SHA-256: 55d3090cd712b992b50b8708d2170d2580eacd4db89450d31f755a1c7de2d92a
font_02_sfnt_off0001194f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194F 13220 bytes
SHA-256: a42b9df11b945dc96c99fd420d36ff2209b0702b5ee9b99c79c6d3c5dba79e56

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