Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15aa64605815b28…

MALICIOUS

PDF

88.5 KB Created: 2021-05-22 23:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e04b6e2c6232e9c50f5113e5e5ecb79 SHA-1: 94172569739cca8b5f1a7c24693d48e6318e5e79 SHA-256: d15aa64605815b28d34962dfba77da443cfff921c2ef88989baf630793cce46d
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-themed and point to potentially malicious domains. The document body, though heavily obfuscated, appears to be a lure related to game file sizes, aiming to trick users into clicking on the embedded malicious links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=how+many+gb+is+apex+legends+ps4
    • https://fugomunufu.weebly.com/uploads/1/3/4/5/134586131/muzulexutijebit-vigizug-xasefokuvoxagu.pdf
    • https://cdn-cms.f-static.net/uploads/4468540/normal_5fd2c384c40ec.pdf
    • https://static.s123-cdn-static.com/uploads/4380219/normal_5ffb2f2de5688.pdf
    • https://vufosaxirit.weebly.com/uploads/1/3/4/0/134018891/bf885212.pdf
    • https://ritukananikunid.weebly.com/uploads/1/3/0/9/130969552/rajezusegolajix_dudatuxado_zusumonurupowe.pdf
    • https://tamilazubi.weebly.com/uploads/1/3/4/6/134604156/xunixeradibuzatex.pdf
    • https://static.s123-cdn-static.com/uploads/4477649/normal_600156447c367.pdf
    • https://cdn-cms.f-static.net/uploads/4456712/normal_6050b6cacdddd.pdf
    • https://lisiladojorinin.weebly.com/uploads/1/3/0/8/130874519/noripuzabuwekoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ef28d4b8-9a0f-4f92-9626-db4350ab35d1/how_to_arrange_numbers_in_descending_order_in_excel_using_formula.pdf
    • https://uploads.strikinglycdn.com/files/3db4c9ce-88ee-47bc-bf8a-64b484c7d34e/generac_7550_exl_price.pdf
    • https://uploads.strikinglycdn.com/files/cfde1c91-0555-41da-8947-480411c7d454/loomis_method_face.pdf
    • https://uploads.strikinglycdn.com/files/542994a8-a0eb-478e-b7fd-4a3c73b5ee4d/basic_mathematics_for_physics_class_11.pdf
    • https://uploads.strikinglycdn.com/files/863b42fb-1c7d-4597-8bb7-dd6734e02deb/rewujap.pdf
    • https://uploads.strikinglycdn.com/files/bf468ade-9fe8-4b3b-a5f4-49396eb4ed5e/10277364886.pdf
    • https://uploads.strikinglycdn.com/files/c55d44a9-146b-4aab-8db6-90216695c3fb/gexamulejofonidotexoveba.pdf
    • https://uploads.strikinglycdn.com/files/8f623b40-b30a-4265-9de7-32460896938a/garmin_s62_vs_s40.pdf
    • https://s3.amazonaws.com/padadutiseni/epididymo-_orchitis_treatment_guidelines_australia.pdf
    • https://s3.amazonaws.com/degagaziv/77321824333.pdf
    • https://uploads.strikinglycdn.com/files/06a8e57a-d844-4bcf-9e4b-b9302f20ab40/vufajusate.pdf
    • https://uploads.strikinglycdn.com/files/b850bde4-6b39-47cf-bf86-bfc999cc1597/how_to_get_playback_on_swann_security_camera.pdf
    • https://s3.amazonaws.com/wamatasamegu/foxit_printer_not_installing.pdf
    • https://uploads.strikinglycdn.com/files/853bc0a7-1699-4675-b272-0c39b87023c6/19932100189.pdf
    • https://uploads.strikinglycdn.com/files/86efc3fb-521e-49bb-bed3-cd851cde1b8f/nuxixerimok.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b22.bin
9f832a13a60426b597ca1691508807e64fe7263838cb24aadc1c2f0e607e3cf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B22 5636 bytes
font_01_sfnt_off00012e5b.bin
4c052ad964c39318c4fcdd3da47e35ea666538eeefb634d444362675d40cd719		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5B 11216 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.