Malicious PDF — malware analysis report

Static analysis result for SHA-256 7706c2ca46eb0f19…

MALICIOUS

PDF

82.3 KB Created: 2021-09-21 01:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6f938e85b87c252745647e6e2f4a5e7d SHA-1: 645dd996379736a191ea1cf83c499b21a89408ca SHA-256: 7706c2ca46eb0f1972ecfa44f33bb0aedad2ba227dfc7d0d36bac75289947705
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content or phish for information. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may also be used to trick users into downloading password-protected archives, a common tactic to bypass security gateways.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crysiq.ru/uplcv?utm_term=launcher+ios+14+pro PDF link annotation
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161334f1d6db2d---10871448435.pdfIn PDF document text
    • http://risme.vn/files/36153995036.pdfIn PDF document text
    • http://olympusflights.com/files/files/lorovilawukoge.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/72010800670.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/21306370255.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/90821097870.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/32904671577.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/5945379635.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/juxaruwexaro.pdfIn PDF document text
    • http://www.slappedtogether.com/editoruploadfiles/file/xuxirifunisepixefuv.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f452f94bab---6273826819.pdfIn PDF document text
    • https://kimcert.net/E/file/18087455140.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210908012709240303go1t8t.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131cdc53f7fb---66122284295.pdfIn PDF document text
    • http://datacomsystems.cz/userfiles/file/60770298571.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/wukonakop.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/23297173554.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/74124408181.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/92496004612.pdfIn PDF document text
    • http://abc-tel.ru/data/File/nidexalabegufowiwowi.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/11a8de0b311c6aba5f1b72bfd309aa96/20476816518.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131151fce5dc---47835791883.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/96517370849.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16146dd9a81d6d---20162473526.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/lajemasafawifopafumujixod.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_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 18216 bytes
SHA-256: b5175dc035ace54bd4935821eda03d41d493e76c60543818c9202e8bcfda13f0
font_01_sfnt_off00010b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B43 10516 bytes
SHA-256: f19016b0a86a4ec9544f6b0a76f417a40085cac2e6d190a21980b29bcf0e7862
font_02_sfnt_off00012332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12332 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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