Malicious PDF — malware analysis report

Static analysis result for SHA-256 711adf0e4bb3295f…

MALICIOUS

PDF

84.0 KB Created: 2021-03-16 07:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b3768e569c60ad79d7656ac76ffad57a SHA-1: 2831d23dedd8c26433bb5e346d5195a512124288 SHA-256: 711adf0e4bb3295ffe3377086e16ee4307751a274df631be63623192614cf472
224 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, several of which point to suspicious or known malicious redirector domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body's garbled nature suggests it's not intended for direct user consumption but rather to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • 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://yafferge.ru/123?utm_term=ark+survival+evolved++character+xbox+one In PDF document text
    • http://fidofawi.medianewsonline.com/sonuzovi.pdfIn PDF document text
    • https://cdn.sqhk.co/bebubofawa/YEtr79q/honey_green_tea_boba_calories.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/22968092434.pdfIn PDF document text
    • http://managerprogram.live/mp3gain_pro_2019_keyxtsnn.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/oxford_picture_dictionary_english_persian.pdfIn PDF document text
    • http://mamontov-net.cc/moruvuwadajawipukuhbw8f.pdfIn PDF document text
    • http://teksalon.xyz/is_taking_organic_chemistry_over_the_summer_hard7ayv8.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/diary_of_a_wimpy_kid_show_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/vjeuA9L/arcade_fire_everything_now_cover.pdfIn PDF document text
    • http://vertigoa.online/the_earth_s_layers_questions_worksheet_answers3cgvi.pdfIn PDF document text
    • http://hookup757.fun/tasivexukiporivezajidaljbk.pdfIn PDF document text
    • http://tujozavido.66ghz.com/b_e_o_full_form_in_kannada.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/internal_combustion_engine_parts.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://runoxujozu.rf.gd/charge_blade_guard_point_guide.pdfIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_447482c5ddaa4c4799bdc07876fdc1bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dixaleko/35952525723.pdfIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_5f8c4fe17ea34606be22987c0ff62dc0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/savifin/33434157785.pdfIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_16afa5373ae74cb69ba2df14f7bc9d09.pdf?index=trueIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_e4f1c1af4140438ca4b715eeff752f99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/discrete_and_combinatorial_mathematics_5th_edition_solutions_download.pdfIn PDF document text
    • http://sibazod.epizy.com/cloud_atlas_piano_sheet_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C2 5348 bytes
SHA-256: 6724c5726909207f720f335cbf5ec5c2a8e50c10ca9b64a68d0c3f680556d367
font_01_sfnt_off000107f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F3 10868 bytes
SHA-256: 853f4b590a58ec3d864e3e53ac1aa76c01629c2c698b7bb3b055a34c730308db
font_02_sfnt_off00012d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D51 16160 bytes
SHA-256: da6e76140f1a5b4508536d15240cdf8fa9f5695c688951e143cfa785d68f3166