Malicious PDF — malware analysis report

Static analysis result for SHA-256 01003dedb0821b98…

MALICIOUS

PDF

82.8 KB Created: 2021-09-06 21:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0310d5b6547c0287935e2c74989756f0 SHA-1: ec39a1718189aeb7a0e5ccd506ac4fa237c22403 SHA-256: 01003dedb0821b989ad21d8bcc45d92467dea97f110f92db97cfa8247ec16ddf
164 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external resources, many of which point to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f389368a7---rasola.pdf In PDF document text
    • http://olgapolyakova.com/files/files/relotazuzuxesedakafumi.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/ed08f96b5b6e08faeb1d2bf479a41602/13988815976.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/d416bm2r8et3psraoltftb6toj/7571776543.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/grahrie62lrab63f9qd659askf/fidomokuxarugagowime.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/45022951139.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/nijodofepir.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786ea599a5f---942318752.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dab8309ab8---82393632747.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/kafukatufazalesij.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/xetewibubu.pdfIn PDF document text
    • https://breedlife.com/upload/files/67157779565.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f55736bfb0---zidilaguvuzu.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcedd04c0c---wokovifetiramofaj.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160cbdb18116b7---vivafilabede.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ac327abf909---40603100778.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/8d63196b18799e5cbf2229ce4d0bae67/42474084216.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/36807162797.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/146d7b0d8c308b29887b8e780f854850/soxiwagumexune.pdfIn PDF document text
    • http://tieuhocsondong.hoaiduc.edu.vn/ckfinder/userfiles/files/vasapi.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51006504652.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/2e38esiu5mrob2s87phkrqm7k4/36390432669.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/nudubodofagemizutefutom.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941de53b09d---13131813748.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=wound+management+principles+and+practice+pdf+free+downloadPDF 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_off0000dba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA9 11144 bytes
SHA-256: b6fc39b5f0427be2bec92825c888b9e42eaedf4fa7bca187e0a1d378a8383076
font_01_sfnt_off0000f587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF587 18020 bytes
SHA-256: 2a55eb4c161a26e8286fb4a9533a895999bb534a2c49025732c27d7eb4092bf2
font_02_sfnt_off000124be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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