Malicious PDF — malware analysis report

Static analysis result for SHA-256 438fd5fe5b3b6660…

MALICIOUS

PDF

83.1 KB Created: 2021-03-10 05:29:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: cc05693e3c347ce1746cb828886a896b SHA-1: d06e6b73dfacbbfd0bd4cd752e6d3e22d1f64296 SHA-256: 438fd5fe5b3b666039f945f6b7301ec7449dce059e79ddc746c0cd7940fe7c7d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to 'golowaki.ru', suggesting a phishing or SEO-based malicious link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and ClamAV detection confirms its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/wix?keyword=james+gleick+the+information+pdf PDF link annotation
    • https://fogenidu.weebly.com/uploads/1/3/4/3/134391000/gojefet.pdfIn PDF document text
    • http://robertferrell.net/188522203949n6u3.pdfIn PDF document text
    • http://azorocheat5.xyz/interstellar_piano_sheet_music_staygjlp4.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/75693646370.pdfIn PDF document text
    • http://hurleyshamburgers.com/pokemon_sun_and_moon_legendaries_shiny_lockedd5ref.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/lilaguwikoziveberolodut.pdfIn PDF document text
    • https://zajevikafe.weebly.com/uploads/1/3/5/2/135297545/9899242.pdfIn PDF document text
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/9733478.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/10059787810.pdfIn PDF document text
    • http://bridgecommerce.com/98023266312v8brd.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/jizubisetebof/venn_diagram_template_with_lines.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/calculating_energy_efficiency_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/total_amount_of_working_capital_balance_sheet.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/pubalemufiwujifenaxituf.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/bookmark_on_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/tekufuxiwoxadizi.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/real_football_games_for_mobile.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/75825461779.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/53475003576.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/95905721286.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/67498808891.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/laderipafuku.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/alcatel_u3_mobile_phone_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/rexaluzixija.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_off000108c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C7 5624 bytes
SHA-256: 5a2bf1bb25b9d22f7b9c292e47244131e70c7618d1cc7fb245117615af4b4b4d
font_01_sfnt_off00011bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBE 10276 bytes
SHA-256: 2f9cc8f6932de8776a18a246d31f709d4bb8eb7d41399bc7f2cc565f9e3b16f6

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