Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ed9152354bae24…

MALICIOUS

PDF

77.0 KB Created: 2021-05-24 02:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9f3d6203d5654b7244fb855871236113 SHA-1: 48a705a38642d6774dca7615564365bd13b727cc SHA-256: 39ed9152354bae2428d60a8bcb7344ff0329f20ad8bca2ef45bc623f43c750dc
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The presence of a "Fake invoice / payment lure" heuristic, combined with numerous external links, suggests a phishing or malware distribution attempt. The primary external link, https://nipisod.ru/strik?utm_term=inventory+aging+report+tcode+in+sap, is likely the initial lure, while the PDF link farm indicates a broader effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://nipisod.ru/strik?utm_term=inventory+aging+report+tcode+in+sap PDF link annotation
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/1836069.pdfIn PDF document text
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/1515647.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb6331d1-7a1b-4b61-ba26-5d90cea105c2/jivofozirununawijefebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3bda7a9-d45f-481f-8353-72ebdee91d46/25951197251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e339ff01-49eb-495f-8f23-85211b6b946a/luxanudobadovakikananet.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/wrong_side_of_heaven_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/apprendre_l_espagnol_niveau_dbutants-_a2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7d0a318-15b0-436d-b76c-5d9054b7de7c/tilidiwivefanenapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b0f9df8-e75f-4530-ad78-01a7ae268311/where_can_i_donate_furniture_during_covid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e696d10e-301f-4153-8fbe-3b132ea6718c/williams_allegro_2_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/dipamitubipeponozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69df84e-a66f-4a9b-af52-f0ec43e18c90/34048943839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f55ddae5-df9d-4633-9bba-5a476cd9e139/nofekopajubugala.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/dreams_and_nightmares_album_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/gikujepefuvegixivix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df698cb-a1eb-46e3-ae99-9803ea52d39c/33256977895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f80c3a2f-f529-4414-9106-fb1992f8b6c2/surfboard_sbg6580_router_ip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8b0be5-daad-4852-b726-3159b67e9e08/how_do_you_write_a_self_evaluation_comment.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/chapter_11_things_fall_apart_answers.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 5308 bytes
SHA-256: 3d98d3d7da139368bdb24569970b7ef09a8ee78ab17bd4872d373c32be717277
font_01_sfnt_off000102b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B2 10572 bytes
SHA-256: 1590067775ccf4b0b2911254cc11c29acc42e2fda416fd1d060c10a9e75bde75

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