Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef78765364d272a9…

MALICIOUS

PDF

76.9 KB Created: 2021-03-14 05:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e08096b5679d49a1ee95d7aab115bbaf SHA-1: 0f6ddc2759b7352f4fcc90cf0e905dba1955fb8b SHA-256: ef78765364d272a96203cba08676162f902201ab531740ac98ace538e2c8d7c6
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farms to obscure malicious destinations. The heuristic 'PDF_SEO_LINK_FARM' and the presence of multiple unknown URLs strongly suggest a phishing or malware distribution attempt. The ClamAV detection and ML classifier further confirm its malicious nature, likely serving as a lure for users to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/123?utm_term=bses+delhi+new+meter+connection+form PDF link annotation
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/gegiwim.pdfIn PDF document text
    • https://febodume.weebly.com/uploads/1/3/2/8/132815732/posenase.pdfIn PDF document text
    • https://damifijaju.weebly.com/uploads/1/3/5/3/135340341/getapajaxuxuto-bevutubaw.pdfIn PDF document text
    • https://sikiroradimer.weebly.com/uploads/1/3/4/6/134619363/budulokuwekas.pdfIn PDF document text
    • https://cdn.sqhk.co/naforokafe/e6jejcP/68904666906.pdfIn PDF document text
    • https://pinipinemijik.weebly.com/uploads/1/3/0/8/130814728/nezuledirotamom.pdfIn PDF document text
    • https://wagidojinubem.weebly.com/uploads/1/3/1/4/131438567/0ff15882c.pdfIn PDF document text
    • https://cdn.sqhk.co/surofowudula/dhfLEja/48127762385.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/wJgi6jf/nrg_music_player_app.pdfIn PDF document text
    • https://wobipogipexiwom.weebly.com/uploads/1/3/1/0/131070125/jijifeguf_ripesa_boluf_xidukoluma.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/tusop.pdfIn PDF document text
    • https://cdn.sqhk.co/lanasido/62jdsZ1/annual_action_plan_template_excel.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/wujapu/paluporexogena.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/joker_getting_hit_by_car_meme_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6332771-f4a5-40f6-91e2-88e63fb4c79c/monster_vault_safe_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/820ac69b-1be1-4561-83ea-a6b1a5947a0e/adobe_photoshop_cc_2015_tutorial_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/dot_plots_and_histograms_practice_worksheet.pdfIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_e86d4567559447e685fd8a9275435fa3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5cdc016-0182-4dbe-8ffd-66a08f799a2c/5_love_languages_acts_of_service_meaning.pdfIn PDF document text
    • https://748e62c5-a849-4dff-87e7-3b5f74cb3522.filesusr.com/ugd/0df896_edadceb033ee492aaf16a9df0da2477d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8bbbfb-3d36-4c18-ad25-70e3922a26f5/printable_frys_first_100_sight_words_flash_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/71678633998.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_off0000f162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF162 5192 bytes
SHA-256: 4601dc544dd2f263ab6a11837dd917b4d0d697d34fd4a05af567de960fc13fad
font_01_sfnt_off000102f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F5 10296 bytes
SHA-256: 52f203ad09857ed653d673acd6638fe88d9a9dc3bccd803c186c457c795aeca4

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