Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6cdabde09538f3…

MALICIOUS

PDF

83.6 KB Created: 2021-03-28 09:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2c7e1ab1ad9025064184dacb76661fe7 SHA-1: ed97f8580e265afbc72383f4072d63b540d7d456 SHA-256: 7a6cdabde09538f3513dd8d67a5f2f8e258ec9c978c198eedfb42257fe60cbd2
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and Weebly subdomains, indicative of a link farm or SEO spam campaign. The embedded content, though heavily obfuscated, suggests a lure related to "life hacks and cheats". The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/wix?keyword=superstar+life+hacks+and+cheats PDF link annotation
    • https://vojoritus.weebly.com/uploads/1/3/1/1/131164067/5f7dd3f242b.pdfIn PDF document text
    • http://flash-sar.online/51546335631ipj6n.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/b5acb84d87676d0.pdfIn PDF document text
    • https://girakojazesu.weebly.com/uploads/1/3/4/6/134675992/ferawejilujug-wegexika.pdfIn PDF document text
    • http://bufo.online/zadinudafijinebirowibijeyw2t8.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/fetwjcl/gizekuxitujinix.pdfIn PDF document text
    • http://circulyarkadigital.xyz/toefl_itp_practice_tests_free_downloadlg3eq.pdfIn PDF document text
    • https://fenipedixov.weebly.com/uploads/1/3/5/3/135385823/9716346.pdfIn PDF document text
    • https://metipejoxeve.weebly.com/uploads/1/3/4/7/134725173/8003679.pdfIn PDF document text
    • https://venivuwaw.weebly.com/uploads/1/3/5/3/135308653/b81ef7bea15f03a.pdfIn PDF document text
    • https://pexekakuxop.weebly.com/uploads/1/3/2/8/132814074/sasuvusitibonitexo.pdfIn PDF document text
    • http://nout-sale.site/bucket_list_with_friends3eiw7.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/giojfji/76282228238.pdfIn PDF document text
    • http://plusstore.pro/sparknotes_book_thief_part_7_and_83an2d.pdfIn PDF document text
    • http://lnstagramcentre.net/how_to_google_search_a_picture_of_someonexqq17.pdfIn PDF document text
    • http://espaceclient-cmb.com/baskerville_old_face_italic_freez1nnk.pdfIn PDF document text
    • http://magnitoli-2ekran.site/mibukavarlml4.pdfIn PDF document text
    • http://tradebot.space/how_to_start_a_newspaper_article_examplerkunp.pdfIn PDF document text
    • http://medyayazilimtr.com/womolabopupi1nchv.pdfIn PDF document text
    • http://uscreditinquiry.info/how_to_adjust_a_vizio_tv_screenhku20.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/gakufowukuvopajubaze.pdfIn PDF document text
    • https://ruxibotululag.weebly.com/uploads/1/3/1/4/131408142/nefurerefir.pdfIn PDF document text
    • http://prosucre.pro/mtd_yard_machine_lawn_tractor_partsjrg2e.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/ajimZgd/dish_anywhere_app_not_working_today.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF466 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off0001054d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054D 5412 bytes
SHA-256: 01d1c2a24bff7066e9dea04a727ad79eab0007e65e8672f84bbbd3aca682d6fe
font_02_sfnt_off000117a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A9 12140 bytes
SHA-256: 082586df1f1e2b6c1dfc268f2681440f53763cd03ed0d7a59afd6c4ca06cde25