Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ff96a0e5ad4dd7…

MALICIOUS

PDF

88.0 KB Created: 2021-07-25 05:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 91b6a77bc8c672bda1d7941650878143 SHA-1: 32bb06b44fdb39eecb4cc9e93412350a0cb21b70 SHA-256: 02ff96a0e5ad4dd78daa87c4733472e9f475203d3b8de764f4adeb7577dd506f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to other PDFs hosted on compromised websites. The primary attack pattern involves luring users to these compromised sites via malicious links, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f41b964cc0---72910813258.pdf In PDF document text
    • http://fouladsazanco.com/Upload/file/20571697768.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/a04a9a8cb247ccc47302346ebdd10e11/jabanamaretixulef.pdfIn PDF document text
    • http://klpa.net/userData/board/file/zuzipero.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/mibem.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/jejesofuxosadarag.pdfIn PDF document text
    • http://righetti1970.com/clients/872956/File/xodififezebifagela.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/28150cffb059e679054c1f1a9cd74a17/warolejusa.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/xulupolewevupabitonakan.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/xujujob.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/85445296448.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/dexupovuwebitepaxib.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077029a7c53a---kuvesiwelodevumewunowok.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/815e43c34a25aa20a50b7e30cc315438/80092014103.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cca2b2c9be3---xadokenilewonupu.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/8863fe69b1d813f0142637e2ea608dfd/toteviwofemufosazozexapix.pdfIn PDF document text
    • https://infotechbg.eu/file/didavesupipimaxile.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160db1a66681bb---89604293136.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/butekarodugukofev.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/mikajete.pdfIn PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/wujujosudigukeliz.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/34540263641.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/f5c38596d8008996cefe68f3aa3fd559/foxakarakoxopovikunibaku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=generate+list+of+unique+random+numbers+excelPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF116 11164 bytes
SHA-256: 0fc3ac37cf0fbc5313362d6bc2ff5965cc8adf12df7919328e01ee981733ba4e
font_01_sfnt_off00010b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12313 17736 bytes
SHA-256: fc0e679aae28ba8992131c07c697d221799e12cb980ac8974c2e4cfdf67a97ed

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