Malicious PDF — malware analysis report

Static analysis result for SHA-256 5672465e5c3e9255…

MALICIOUS

PDF

75.6 KB Created: 2021-03-29 07:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 32cfbd0334d2bbd2b287ac93a082f8c2 SHA-1: 411a60fd58c6bd5bd4ddd1edc440e10ab176cc67 SHA-256: 5672465e5c3e9255491e48c02ec2b7d9f20ec432ce1ff1b2ee8f381a53e0ab56
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 point to potentially malicious domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=is+there+a+constitutional+right+to+religious+liberty PDF link annotation
    • https://cdn.sqhk.co/dawolesirip/agIhijf/voxerapokenedixalawuxev.pdfIn PDF document text
    • https://cdn.sqhk.co/sixerusesebu/wRjgieN/super_mario_world_the_lost_adventure_episode_4.pdfIn PDF document text
    • https://cdn.sqhk.co/putomikoluku/WlKgcgj/video_editor_jobs.pdfIn PDF document text
    • http://sunobalizumona.iblogger.org/ceiba_insignis.pdfIn PDF document text
    • http://lelazuw.iblogger.org/77114892891.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/mPfz4hi/arenal_volcano_eruption_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rejelozekazo/fjds8jb/17061131143.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/fotojipifuzitul/lockout_tagout_procedure_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17bbb77a-8ec7-4d4a-a0e9-cd598c904a0d/tp_link_wr841n_firmware_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/66830488506.pdfIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_9c348901d6584505a0f7de79de7e609f.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_5386ee3515f341c4a46091f7dbcecd0f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/53cb1da2-5e95-4364-8395-4a5bfda87aee/85106092956.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/math_solver_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c14771b-a26b-4c99-8f5f-13a889441cfc/qual_o_iof_do_carto_de_crdito.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/how_to_make_a_price_comparison_chart_in_excel.pdfIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_6af7e5272911482aa4db85734f55998d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c70ad92b-b6c4-4755-bd10-f80fa85d666e/neuropsychological_assessment_of_dementia_in_adults_with_intellectual_disabilities.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/how_do_i_scan_from_my_brother_printer_to_my_computer_wirelessly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1bdca9-a053-46da-a5b3-535347de2dc0/87051264031.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/80710535877.pdfIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_e9a430d999b447d3b827bf0d5960eec6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/matejodadopogajovimesa.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/21853385717.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_off0000e887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE887 5240 bytes
SHA-256: 2a97271714af63046830a1d7f3175db20848fafaeb9816319a27d16a00f037fc
font_01_sfnt_off0000fa5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5A 11568 bytes
SHA-256: 4d1b516a5c0da2990e7319703021a537a52facb1dae3052d444f0ed589c358a9

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