Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1036c07239ffad…

MALICIOUS

PDF

69.1 KB Created: 2021-04-01 12:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 024b16cf6be4c8288fecd904e1c89613 SHA-1: 1619fb1d13443a8ecbc2e3ec8009e60d5cccd042 SHA-256: 0f1036c07239ffad73e0fa789e5ec6c519359fe7d0ca92e0c02b1ec5f6b20bdc
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/wix?keyword=mcgraw-hill+economics+workbook+answers PDF link annotation
    • http://zosuzalazuxobob.iblogger.org/28706838147.pdfIn PDF document text
    • http://pristav.pro/50362035602nblut.pdfIn PDF document text
    • http://geosen.net/78288492254kww0h.pdfIn PDF document text
    • http://puwuditufu.22web.org/lenovo_g50_bios_update.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/2rHdgho/youcam_makeup-_magic_selfie_cam_virtual_makeovers_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rinulazopun/prV32gg/monkey_fight_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zatuwifezub/2hehhhi/37957648527.pdfIn PDF document text
    • http://clubstore.pro/cuales_son_los_sintomas_de_la_neumonia_viralocnuq.pdfIn PDF document text
    • http://nijovilof.iblogger.org/66856457136.pdfIn PDF document text
    • http://pumba.fun/saguduzyppq6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_d8aee5deded5423aa0fa9740a95aff9c.pdf?index=trueIn PDF document text
    • http://sumafalonedap.rf.gd/la_tercera_palabra_alejandro_casona.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/realtek_hd_audio_manager_speaker_fill_not_working.pdfIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_107bab75406a442d8bf96c0de622a3f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/azure_arm_linked_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/46215958315.pdfIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_8a80220e7ff047e38a5299247597157e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lunojol/xofopuvenubujinabivurix.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/78537031770.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/pusesesepuwaboj.pdfIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_a97e6539cccb48198f36e74b9ea5c6af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/dijipuwigosubo.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/jenefafewujop.pdfIn PDF document text
    • http://kulilemol.epizy.com/ap_calculus_textbook_download.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_off0000d0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F7 5548 bytes
SHA-256: 5fef7354177ee9250bd3dcb355959bc71e806b914336a4c3e45b259bf0339552
font_01_sfnt_off0000e3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CE 10316 bytes
SHA-256: c8cef364b730f59697e6eae1a91f95985d56bec3c25922a73d55befc6b84e2e7

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