Malicious PDF — malware analysis report

Static analysis result for SHA-256 057fdae6c26820d1…

MALICIOUS

PDF

88.5 KB Created: 2021-08-07 09:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 0014685e2caba9564e1eb957ca5221e8 SHA-1: 7aacf852fa16cb5e4350ed7b95fe78f22e36496c SHA-256: 057fdae6c26820d1414eaa6af633f1e79239f1deb0d86456d76b4c534f15737c
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or trojan delivery mechanism. No scripts were extracted, but the presence of multiple compromised CMS upload links and disposable hosting points to a coordinated effort to distribute malware or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://drafthe.ru/uplcv?utm_term=how+to+turn+off+sleep+on+dish PDF link annotation
    • http://gdlianyu.com/uploadfiles/file/gojawa.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/68845734907.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/4fcfb2bbda7632b5dfbb8f7ed69eab6b/mudajoruritijafotaz.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916a4278def---69531019443.pdfIn PDF document text
    • https://grandstone-egypt.com/userfiles/file/67702220232.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/99415684885.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/ba350c715478ab121fdbcec3a52c583c/supedevasabelober.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/wuzotatidux.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/wifimemud.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/7962137994ce3ccb3d24f70a2bbc79b4/dilunas.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160754bf47e749---razimikunusatajixowoku.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/xixulus.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/i88ugt1reqj210b06hcgrnav0a/22209241634.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/79a7cbeb06d62b38f27feac5e4dde2fb/81634601827.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610316253bdb9---60496551693.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/69266803527.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/e5e916b7248624d137795cd7ff8fbaf9/zusizutowufijivevu.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/74399349704.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abaafd851d7---79457196172.pdfIn PDF document text
    • http://henca.com/files/details/file/64884405796.pdfIn PDF document text
    • http://prosquash.by/data/80866170726.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610761cd3658a---20928115538.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607414c9355da---jugonexe.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/79966121953.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/16097095709.pdfIn PDF document text
    • http://falerisztika.hu/tmp/16379247652.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_off0000f68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 16840 bytes
SHA-256: 807fd79267b9dfa5efb09c41583a2c97403a746a4e83cd048d8729382fa0148b
font_01_sfnt_off0001222b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222B 10608 bytes
SHA-256: 681f1bbc675ce1ab331058ebd5e21b69650e8d6f219f6d51c86ae0e18a0444eb
font_02_sfnt_off00013a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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