Malicious PDF — malware analysis report

Static analysis result for SHA-256 d260df46c0212775…

MALICIOUS

PDF

92.3 KB Created: 2021-08-08 19:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6527220f03d565ae11431402c30486f9 SHA-1: 55f267c28902469864689f87bd0f7db0a776dbe7 SHA-256: d260df46c0212775ec868fd49562b6fa36f4c82ade55dd9a93cc7117f4dd5e85
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to external sites, some of which are hosted on compromised WordPress installations. This suggests a phishing or redirection scheme designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/3eb80ca1c0495c6cd503ec7cd37e2ec3/woravepigaz.pdf
    • https://next-engineering.com/userfiles/files/70185266641.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610e1ad7e2a3f---55036911299.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f05cdf42fff---57009735423.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a782aad0988---72995474813.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/8d696a2768837fb3fa298b5d8a4cbd4a/45145791383.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87d6e71233---41236725652.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608361b74c984---29687307023.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098babf83666---repikibumuwetupazavekadu.pdf
    • http://ansing.nl/userfiles/file/99109209603.pdf
    • http://indago-rovigo.it/userfiles/files/bibivaju.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b113982337eb98ff487b26f030b9903b/bonajezajak.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cea7c7c53---livubugedimirasi.pdf
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/topudenanajujoni.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/4de118d1bb79f4bbcab1c353f1dac0bb/66823062615.pdf
    • http://cuboni.com/uploadfile/hong202106082233225602.pdf
    • http://www.logomarcanet.com/userfiles/file/donada.pdf
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/sevijowogufofo.pdf
    • http://puntolinea.org/userfiles/files/nubulowukiwuvifi.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/an7gh284u7rldqc7abqbpg5rg4/guvip.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ntb9cn9te2ob36osglmlmm2287/fudeluginumelolazabu.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b0828667b---rijinilop.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/tu00ae512ghlul0q3o91q4la0u/89668404261.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+do+you+convert+direct+speech+into+indirect+speech
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2B 16792 bytes
font_01_sfnt_off0001143d.bin
3fdd6176c7a705eea71579ea213bfb2d77333729b1b5f2bbfdc624f5b2948265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1143D 16976 bytes
font_02_sfnt_off0001401e.bin
cd9ca98397a0d4575d390a8a5302502410cdb34e33b50fafec52a22123508f45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1401E 10760 bytes
font_03_sfnt_off000158ce.bin
956a59ce88d16d18682f88e8006d486c34ec2890eecfa153a08c3a0b5244bc99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158CE 1952 bytes

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