Malicious PDF — malware analysis report

Static analysis result for SHA-256 df296b0a3a4a334f…

MALICIOUS

PDF

78.2 KB Created: 2021-02-19 18:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c86c4d6c4db6bf3e3ee711907f61414f SHA-1: 008e25564bfe4a6f25860310946470eb0dfc23db SHA-256: df296b0a3a4a334fb21013849012a290d74de4e8b3aebe7ce13d1d58f89b2ed0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are SEO-optimized to appear as legitimate documents, but lead to suspicious domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the 'PDF_SEO_LINK_FARM' heuristic suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/123?utm_term=sap+successfactors+recruiting+and+onboarding+the+comprehensive+guide+pdf PDF link annotation
    • https://bigififipajug.weebly.com/uploads/1/3/4/7/134709095/1394074.pdfIn PDF document text
    • https://cdn.sqhk.co/tefivezik/MlRSgim/botuminuroxelowodavodala.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/gWjc66a/ridaxab.pdfIn PDF document text
    • https://cdn.sqhk.co/doxufojixene/giieBjg/domino_game_shop_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/buruvalufe/jFKjaho/monster_ball_go_mod_apk_download.pdfIn PDF document text
    • https://xuzimelo.weebly.com/uploads/1/3/4/1/134132070/425444d.pdfIn PDF document text
    • https://geworusidexaj.weebly.com/uploads/1/3/5/3/135306562/liwekedivizo-jikikakakopuzu-vokirefadowej-xazetesigipiloz.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/tglArjd/penguin_simulator_roblox_code.pdfIn PDF document text
    • https://dodesagetulisuv.weebly.com/uploads/1/3/4/9/134902864/bofuwavusuvinut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimeroxivekafos.epizy.com/network_topology_visio_stencils.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/avensis_2002_t0_2007_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/zivinikonegabidolig.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/guideline_for_liver_cirrhosis.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/ben_10_omniverse_video_game.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/calibre_free_for_windows_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/cargar_imagen_en_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/gardens_of_the_moon_parents_guide.pdfIn PDF document text
    • http://mowumaja.epizy.com/rurowubefelonefoberori.pdfIn PDF document text
    • http://fosisidevafepet.epizy.com/gakamuponovapodozowodezir.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://scripts.sil.org/OFLIn 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_off0000dc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3B 5840 bytes
SHA-256: bcb2829c3f2cc07b7810c635adc65a7aadaaf5122c24ced309caec0e87bd8247
font_01_sfnt_off0000eff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF5 11404 bytes
SHA-256: e477fd8e6abaca0b8397bb246350faf70266976a06a431e29c2c14ffb1d781e1
font_02_sfnt_off000115e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E4 16100 bytes
SHA-256: f12bcc42cb143e9cc41a08ef9f9c81c8a36c017982c073a20263204097028d61

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