Malicious PDF — malware analysis report

Static analysis result for SHA-256 20585108dc31ed35…

MALICIOUS

PDF

84.7 KB Created: 2021-03-14 10:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 601401b2e3fa092bacbefedcbc94a59a SHA-1: 215b2030d5a81fab9984a1052fe6e5c854e0fdec SHA-256: 20585108dc31ed35fcd861c4ec0f498eaa2b69d643b88e6b86f943309e1724ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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 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://mezovuduw.ru/strik?utm_term=how+to+measure+a+stihl+bar PDF link annotation
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/nofutelajatu_fetosi.pdfIn PDF document text
    • https://muneberixiloza.weebly.com/uploads/1/3/4/3/134339704/favujod_sesewed.pdfIn PDF document text
    • http://xijipeva.mypressonline.com/3996291712.pdfIn PDF document text
    • http://korefubelexusiz.medianewsonline.com/can_b_positive_blood_type_eat_popcorn.pdfIn PDF document text
    • http://kanshoper.site/how_to_reset_my_plantronics_voyager_edgemehkc.pdfIn PDF document text
    • http://copyrighthelpptteam.com/43030720468yodz.pdfIn PDF document text
    • https://bozobamawokoruv.weebly.com/uploads/1/3/4/3/134350924/jupab.pdfIn PDF document text
    • http://madamzero.com/what_happened_between_the_old_testament_and_the_new_testament8ghv4.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/bowexi.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/29553728329.pdfIn PDF document text
    • http://babysampler.com/movie_maker_online_free_video_editor_downloadiz3or.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/51940087142.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/22748190562.pdfIn PDF document text
    • http://wegaturagifo.getenjoyment.net/gexedufixop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b505a9-ea61-4ff7-960a-a6c868adc6c1/45219685707.pdfIn PDF document text
    • http://gumizaxewa.atwebpages.com/89459250126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a5765f-e631-40d0-8fb0-ec4a8d97164f/harry_potter_books_first_edition_amazon.pdfIn PDF document text
    • http://bigofufujenu.epizy.com/house_cleaning_schedule_excel_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4287f1-6fb4-4ee6-bf37-ac96daee0363/jisede.pdfIn PDF document text
    • http://fezovabanufoben.epizy.com/28898550473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e4451fe-b733-43ac-8272-972cc8b7208c/35376929473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51fedc3-1f69-42a5-bd3e-a3ec77291e06/how_to_pair_tws_wireless_headphones.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 5120 bytes
SHA-256: ea885be976bbd5a4e507ef071fbe3cdda9869970e8562d55dba8344319f10189
font_01_sfnt_off00010048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10048 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000108d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D6 10736 bytes
SHA-256: 74cb92403e38f921a21419bf8363a58f8b131cec10010556ebf4fed080d0b889
font_03_sfnt_off00012db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB2 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e