Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa612e4c89898c0e…

MALICIOUS

PDF

77.8 KB Created: 2021-04-02 08:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2ca4273d7d2f441f9ddcfeeebd063542 SHA-1: 5893496ae3e4f7d0463f1f44dec3b1361098da99 SHA-256: fa612e4c89898c0e6da65695b2bfd2a112dca4177180f90767967a6677f52577
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://gimoguvi.ru/award?keyword=bank+po+exam+syllabus+pdf', is designed to appear as a legitimate search result, likely to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/award?keyword=bank+po+exam+syllabus+pdf PDF link annotation
    • https://xepevuke.weebly.com/uploads/1/3/0/7/130775471/7a75b778ac69.pdfIn PDF document text
    • http://tryplafond.xyz/equivalent_circuit_diagram_of_transformerok5n6.pdfIn PDF document text
    • http://noxokolozoj.iblogger.org/33102648006.pdfIn PDF document text
    • https://pofomagod.weebly.com/uploads/1/3/1/4/131483550/pewipoxakezonekexofa.pdfIn PDF document text
    • http://fevofawemuwa.medianewsonline.com/13260787332.pdfIn PDF document text
    • http://pijabaralipori.22web.org/88549146950.pdfIn PDF document text
    • https://buzoraxuv.weebly.com/uploads/1/3/4/3/134366179/691fd86e360c9.pdfIn PDF document text
    • http://hookup153.fun/open_redhead_gun_safe_combinationaikr5.pdfIn PDF document text
    • http://mir23.xyz/kufibesuwerulu0idda.pdfIn PDF document text
    • http://mirror-x.org/how_to_make_brisket_slow_cooker5q8w3.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/bezutu/sitafawewitobax.pdfIn PDF document text
    • http://nodikaduf.onlinewebshop.net/xutasiv.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/page-_break-_inside_avoid_not_working_mpdf.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/bhagwa_rang_full_song_free.pdfIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_707ac9ae2ca147d9a7f6ebb9187a2287.pdf?index=trueIn PDF document text
    • http://dugipiwem.epizy.com/xetediwa.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_c06f3a5d1c944fe79bbb14eb0b64c6b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/fun_activity_sheets_for_high_school_students.pdfIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_26fabcf82adb46d29b2511937d173d7d.pdf?index=trueIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_340b9cbd294b484780991ea588fa272f.pdf?index=trueIn PDF document text
    • http://bomajada.epizy.com/banjul_charter.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_off0000f32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32B 5512 bytes
SHA-256: 536afcf5c63aa3f0df867ac0806585cb7d43c5a6b1d0299eb997ff8a287397d5
font_01_sfnt_off000105e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E8 10696 bytes
SHA-256: f91f8d4bc549f1ed3ee95e1c02b415811034842e79d564843299fe5cdaa0d520

Open this report in the interactive analyzer, or submit your own file for analysis.