Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c9d6778c67d715…

MALICIOUS

PDF

74.6 KB Created: 2021-09-02 03:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 367b424cdbf0b0091b80c38541e7684c SHA-1: 37f80b9c0c559e41464846c674380442259a4757 SHA-256: 22c9d6778c67d715332d808fb638cba7814c516cdcde97c462b263987d6abb6d
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 compromised CMS upload directories and disposable hosting. These links likely lead to phishing pages or further malware downloads, exploiting the user's trust in document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://coretry.ru/uplcv?utm_term=lubricating+oil+manufacturing+process+pdf PDF link annotation
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160747c0d4743d---regevavorumiwusazal.pdfIn PDF document text
    • http://boxethai38.com/upload/file/vizezudesunoboxat.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/21169752655.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/87031167370f8d697c3ce427c1a2adc0/98992393699.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/dnt7k6bk1g7ou6uqls0e4hrau2/lakanokawuwuzofaxebujebo.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/n1nkpsdtbk2t24q87qn635vj00/49053957361.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/4cue5f8d3gg6oc3p4shvug0d02/pakejepedopejelal.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/39798812336.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/32911054972.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/61795572960cb2bdb3ae60.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/c86dca98e1ba9e448d52f546594ee703/virufubawuforigilidoso.pdfIn PDF document text
    • http://ozari-ua.com/files/file/penapakomewe.pdfIn PDF document text
    • http://abbeloosschinkels.be/userfiles/file/56797413950.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/budebajofijajifuxid.pdfIn PDF document text
    • http://mmcaana.com/clients/29274/File/67486607563.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/wufewetupidemiga.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608183d2b8a9e---fumaruxeladofuputi.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/qbdb7k4n9hl2hjgskdi8j5073d/71414760952.pdfIn PDF document text
    • http://elijahlaurabishopblack.com/clients/b/be/bed082b287f5bb70db4763ab929fc18a/File/95176336242.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/7966215381.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/sobp1lohasjvgp31t04l42r42e/46656953829.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613005aa18900---38301369426.pdfIn 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://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_off0000c1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E4 15428 bytes
SHA-256: e145139208c4ec7ae7753e92d95de9a55d1f117caffec9024e4abacea87aa3df
font_02_sfnt_off000100b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B3 11160 bytes
SHA-256: 8621f7694056982f385fba97ca4d333d8e6e03420fc2c04d7498ad1b3be5fda7

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