Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af5a1348334865e…

MALICIOUS

PDF

80.0 KB Created: 2021-09-08 02:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 61f9683aed11925ab230825195bf040c SHA-1: c72607c0b5fdf67c035621457999f1293573b35e SHA-256: 0af5a1348334865e1ea5d0f373e7f02b70b2a1edb6f44c4cdd1ace3be49b36d7
156 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. Heuristics identified it as a link farm pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution scheme. The PDF document body was unreadable, but the presence of numerous external links strongly supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://rotterdampools.com/contents//files/kofepokipazes.pdf In PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/85ced3b72cbc6e8ded1ac9d73ee0b449/letupizikegu.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/66475c3b3751320e177c4140264cf9ea/badegu.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/tokomutatiwewixekus.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b3152e196e3---zokogola.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/18845235394.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4297403913---30125195447.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/sowejipawimumod.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/63885136919.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875112f248f---wajuwegapiziw.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/ganol.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/13868535940.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/57214813622.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/11008024000.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/fuboted.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/1b18qe725r2aj145bq3gi1aavt/xijokaxolire.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/varizununitajipozu.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/tokinimefibiwoje.pdfIn PDF document text
    • http://come2menorca.com/images/file/monukikuseni.pdfIn PDF document text
    • https://rotterdampools.com/contents//files/kunozafujepo.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/96157557809.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609208f9ccade---surejuger.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/wofewasotiridusuzum.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/4303ffbca66ce036d9d6795578fe8e2a/lusuxamuvovuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=terjemah+fasholatan+pdfPDF 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_off0000ca95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA95 21468 bytes
SHA-256: d761b86e762012292860d4a49063cd05bbe84069a8b9c5ef3b9fb036830163a2
font_01_sfnt_off00010198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AF 10764 bytes
SHA-256: 815b8c34e6aa8147ab30693b4a281207d5adbc1bc3e71ea1b7fcc67151f199b9

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