Malicious PDF — malware analysis report

Static analysis result for SHA-256 070fa231d496c97d…

MALICIOUS

PDF

74.8 KB Created: 2021-09-01 06:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3653599ac4cff5283b0f59efdd7e444e SHA-1: c66273b572b8b714573c258c313dce20ea51e8ec SHA-256: 070fa231d496c97d2e5daae81424aab681e40a0cbaf17e8294f7a7278a68da63
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, many of which host other PDFs. This structure suggests a link farm designed to redirect users to malicious content, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent.

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://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/i79am2e444etpcm95ibkj65vt0/98321786845.pdf In PDF document text
    • http://chuaphucluong.com/uploads/image/files/vesidovixazirejinafene.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/41272478217.pdfIn PDF document text
    • https://music-group-store.com/upload/files/98546973602.pdfIn PDF document text
    • https://drhuanghair.com/uploads/files/202108311336481461.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/59211878148.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/lavuxosuta.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607488a0ea3a1---zolodaxisetijerojixedak.pdfIn PDF document text
    • https://aedwea.com/upload/foto/rajilo.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/66279995832.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/34c1ba114b5ac8f4cd52e1bb53f3a9d6/64215197345.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16076c3e4d5bcb---75761925805.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bb11340c0---kuzolosonozesotuzak.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/c79cjb01ajtbmmj8sf46gc9660/buron.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/mafofoxabodolojikixasiruz.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/eaa13908b63b2fbd2d672b88f704565c/68261279982.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/wajigizejegemenaleze.pdfIn PDF document text
    • http://novehorizonty.sk/userfiles/file/bekubifewobur.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/rowavetazajuwuz.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c533b9765---balemananowuxuxafatobexab.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/86512ca91d56ed5240e9288a85e73156/gemosujokojekexe.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/dbtut5qqa37lp8q62d1aelhbb4/5398506202.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=kroll+on+futures+trading+strategyPDF 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
    • https://investorplace.com/options-trading/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_off0000bff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF6 10732 bytes
SHA-256: e4201edd8ead6f8674012299aacd6940ba8c2a1a4f89ca5797a12ee8b468f00f
font_01_sfnt_off0000d88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88D 16872 bytes
SHA-256: 13d549d7ef441a34ce6f261afe18f7c745b79817b13b64d3909ecce69d3cc57f
font_02_sfnt_off00010383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10383 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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