Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f2ef37b020da88…

MALICIOUS

PDF

97.0 KB Created: 2021-06-25 20:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 98af682e2962f6e23e50112fffcf59fc SHA-1: 2409372ced12c66168011273070ad9bed376984d SHA-256: 29f2ef37b020da883c817427d5cbeac429cd50af5aab2cbb2318f64c8d6fb6ba
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/2dff0b22d16a661d33ab01013e09b65c/kibaxigilekapowujoju.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/cc0d8d10003bb42a608fe414a92c0a31/46070316646.pdf
    • https://publicbridge.pl/userfiles/file/paxulebametupabefategefel.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/68f5ae22e249ec882e033948f1ba296e/dogidodidafuvimi.pdf
    • http://heyumpnd.com/userfiles/file///72051221708.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/0eadddeea7ca5ec65b05813f3cdf6052/xubadipeg.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf26141a6---12466972398.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160835f7166b62---44574509644.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607373827e432---zulajevijo.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8f65b133e---vesez.pdf
    • http://hasici-pristroje-eshop.cz/files/file/74344851882.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07ef2c22bb---jezupixu.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/6d37cc125951d30117df66de94ca9151/99939649571.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/ic2dbecscs3rd8o7edsoc1kt13/riluk.pdf
    • http://happypalettebnb.com/CKEdit/upload/files/lumajonitekigudugarubizo.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/sutsqh8mb3ukf1qfh3cldg3nf1/57660367423.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607e523baed8f---kafodapuxesadabolupow.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/g9k8kfdadt71eh27sj07ioped0/butazusaso.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/ed20841c12f14279fae7a8dd7b03b09d/34604887411.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16083659e10c22---24327344518.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c09b49be6d---bonigedumogezulolimufefe.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb7dd5d696---kokines.pdf
    • http://travelport.pl/userfiles//file/11669869820.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609560ee439ec---kuvawutegerepok.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/ebfe5917ceaa9f5bb228e70ba6d236a5/86456201033.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=what+is+the+substrate+of+salivary+amylase
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff1f.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1F 16252 bytes
font_01_sfnt_off000114ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114FF 16792 bytes
font_02_sfnt_off00012d11.bin
695bf46215eef8dae24d91b39a09a02e42f2300f8fb893cae3d2647edef756e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D11 17816 bytes
font_03_sfnt_off00015b46.bin
75bcc1c49184a851022151a84dd2fb398d8e44f32becc1280938555eb465d5fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x15B46 10788 bytes