Malicious PDF — malware analysis report

Static analysis result for SHA-256 9798a8f6c196e60e…

MALICIOUS

PDF

72.6 KB Created: 2021-04-20 04:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 47573bdc3f4fc24a12fe8b530db1c057 SHA-1: 93693470f67dc84ede254bea597cde5d879ad9be SHA-256: 9798a8f6c196e60eeabddce2e78cccc53cfe0355bc2528aae7c9fa515212e242
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains a significant number of external links, including a link farm, suggesting an attempt to redirect users to malicious sites for phishing or malware distribution. The presence of embedded URLs and the ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://dugedepap.ru/strik?utm_term=why+is+biological+half+life+important PDF link annotation
    • http://vodabutopidaru.getenjoyment.net/add_watermark_to_in_acrobat_pro.pdfIn PDF document text
    • http://bosivutefap.22web.org/52437841662.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/pevibodatuwon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab04fa03-ac41-4cb5-90d1-65cdcb0154e7/varugiribosus.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/vidas_secas_graciliano_ramos_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/chloroplast_and_mitochondria_coloring_worksheet_answer_key.pdfIn PDF document text
    • http://jumivozapiv.rf.gd/ximuxabadotejuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/ranazexariramojudus.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/41869469229.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/45200183785.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/how_to_connect_ipega_9068_to_pc_via_usb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77eb7e1e-553c-41c7-9842-bfb1c5c0a5f1/48494900201.pdfIn PDF document text
    • http://kemesuxaw.myartsonline.com/37467498552.pdfIn PDF document text
    • https://f0f855fd-29d2-4bf6-9fdd-af1de8d1f91d.filesusr.com/ugd/184831_5288289533d1462ea386d7c6d15733ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0498385f-f88c-4e9a-bfb7-c1a8e48537d4/is_a_dodge_avenger_front_wheel_drive.pdfIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_3d5c625f69f143d195d73ac92331d020.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/882cd609-8f63-4d62-836a-742bfd3b6532/where_can_i_watch_newsmax_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/fly_fishing_guide_school_idaho.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/5745412148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ae6b5e-cc14-4a28-b26f-8613b54bc463/31893934562.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/fekepipe.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_off0000dcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBC 5684 bytes
SHA-256: ceda9a656b79afa2f0eae93497d8c08aa8b19f8bf55a30a1fffd4cd280ac2fc7
font_01_sfnt_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 10696 bytes
SHA-256: 67e5b0b393b60ab65748cdfe2173c10474894751fb11e95eecfde4d304440e52

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