Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac3207f8dceffa6…

MALICIOUS

PDF

99.6 KB Created: 2021-07-23 22:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41d7775b0e374aacc003d6ba84382ba8 SHA-1: 023863bf8fc2b6d085212a02d38897dbf214c6f2 SHA-256: 1ac3207f8dceffa6310b0d1f20ec4541a17770ab6a9b960f0d9d797adeb86f53
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which appear to be compromised or disposable hosting. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. No scripts were extracted, but the overall structure suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://autosaloncenter.com/uploads/file/lotasajejofena.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/2114ed269409ec80ba4847fbdca778a7/52657502390.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/b8bbbd1ed3ef77e7128609665f6b3d99/rekimajugomamajegobujitiw.pdf
    • http://ghalemdi.com/userfiles/file/41768014402.pdf
    • http://coreaad.com/DreamDataUpload/file/noxalozifukupowu.pdf
    • http://imbirimbir.ru/files/32051839457.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96da9cb54---rinokomili.pdf
    • https://susta.vn/userfiles/file/vunivofinutopigelat.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/4ce85d6508cd527e052e50c6249c3d2a/64724625155.pdf
    • https://condominiobrisasdelnorte.com/userfiles/file/37892183178.pdf
    • http://automotiveenergy.cz/userfiles/file/juxifezikujima.pdf
    • http://barcelonasixtytwo.com/userfiles/file/lusoz.pdf
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/8610a3d754064de579e546d257a4ec21/bubemejudi.pdf
    • https://medtek.vn/storage/file/xosadetilo.pdf
    • http://summithighschool1958.com/clients/71652/File/nokurar.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089d530a7c2d---suxaxemiti.pdf
    • https://implantsdentairesdesmoulins.com/upload/editor/file/gudalusobifufujelifuz.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607092c4a16fd---68079413357.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b2ba3fa8a---65502117056.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa0db85672---82589909262.pdf
    • http://tafgambiatours.com/userfiles/file/45843451007.pdf
    • https://foundryindia.org/userfiles/file/guxukufovatokidenimij.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6179d6b23---75391058177.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=1000+problemas+de+razonamiento+logico+mauricio+amat+abreu+pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bde.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDE 16792 bytes
font_01_sfnt_off000133f0.bin
af937e6f154b5d0e6ab967f889be8295f14db4f48380027b55b630c2ec20a785
pdf-font-stream PDF embedded font (sfnt) at offset 0x133F0 18708 bytes
font_02_sfnt_off000163b5.bin
9c71b9a9a6280a300820720461bc2dc0ade12c2ae8908cbc00458ba80acd6066
pdf-font-stream PDF embedded font (sfnt) at offset 0x163B5 11340 bytes