Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03e7993effdd729…

MALICIOUS

PDF

99.7 KB Created: 2021-06-08 02:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 61d1c5681609c0052d35e3988277f588 SHA-1: aced02356a46b2419fabc2675d4098db79eed1e6 SHA-256: b03e7993effdd7290d09bf600fa2d7ea56e6d33a22fb414b94ee8ebb2d0c52ad
186 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 hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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://philabc.ru/pbw?utm_term=best+tree+for+dual+blades+mhw PDF link annotation
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/sodererulenej.pdfIn PDF document text
    • https://fokomowopijav.weebly.com/uploads/1/3/4/6/134643156/vagebavafam_benozesapeli.pdfIn PDF document text
    • https://kixuvatapowow.weebly.com/uploads/1/3/1/3/131383305/8024150.pdfIn PDF document text
    • https://nunavupogo.weebly.com/uploads/1/3/4/4/134471291/4142615.pdfIn PDF document text
    • https://silusakukomuvu.weebly.com/uploads/1/3/4/7/134763582/304fffb90.pdfIn PDF document text
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/botubowiner.pdfIn PDF document text
    • https://temaxamozasot.weebly.com/uploads/1/3/4/0/134096852/0c6b5.pdfIn PDF document text
    • https://punujagenak.weebly.com/uploads/1/3/0/7/130775029/04c66a12f14.pdfIn PDF document text
    • https://jevikefogonilij.weebly.com/uploads/1/3/4/7/134747067/4766361.pdfIn PDF document text
    • https://derewoju.weebly.com/uploads/1/3/4/3/134319287/1e0cf8e5fdbb4.pdfIn PDF document text
    • https://mabavelege.weebly.com/uploads/1/3/0/7/130775551/db955ac.pdfIn PDF document text
    • https://fenolipemul.weebly.com/uploads/1/3/4/3/134341818/dikel.pdfIn PDF document text
    • https://weromosamewose.weebly.com/uploads/1/3/4/2/134265498/noxuxomibavavom-xisebe-sasodo-bekebonuxovibo.pdfIn PDF document text
    • https://dedarapovoxorag.weebly.com/uploads/1/3/4/7/134748910/bixaparusatoz.pdfIn PDF document text
    • https://pinosapop.weebly.com/uploads/1/3/4/1/134131344/tekodepax_mamif_dixos_gatafud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xizegopago.pbworks.com/w/file/fetch/144699381/how_do_i_get_my_own_coat_of_arms.pdfIn PDF document text
    • http://funesut.pbworks.com/w/file/fetch/144699798/75472216456.pdfIn PDF document text
    • http://zufiwuz.pbworks.com/f/go_math_lesson_5.4_answers_5th_grade.pdfIn PDF document text
    • http://rasetewi.pbworks.com/w/file/fetch/144778155/how_many_questions_are_on_the_north_carolina_notary_exam.pdfIn PDF document text
    • http://wemilamozede.pbworks.com/f/top_offroad_4x4_simulator_mod_apk_unlimited_money.pdfIn PDF document text
    • http://sujagajo.pbworks.com/f/saoti_arewa_latest_song_2019_mp3.pdfIn PDF document text
    • http://botinuba.pbworks.com/w/file/fetch/144608742/how_much_are_20_year_old_barbies_worth.pdfIn PDF document text
    • http://sozevupegufi.pbworks.com/w/file/fetch/144712542/adjectives_and_their_opposites_worksheets.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_off00011b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B08 4488 bytes
SHA-256: d909ed7e38886eb5d00d584d1057b1e0bb2ff42733f879ae81a81011883f43d4
font_01_sfnt_off00012ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE5 5428 bytes
SHA-256: b7d12a8ea1b9c71700c8b44490e7811a5e3bd059701ae7b1268402926e0a8ceb
font_02_sfnt_off00013d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3D 13756 bytes
SHA-256: 833e13783fcbd51c6879d850778ac11b2ecd089cb2acf482af67b980b5625bb8
font_03_sfnt_off00016adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ADB 16328 bytes
SHA-256: 26ca8fc05eda2bc25bba66f7933efab030aaec076eb503e4ad8d7d44645d7da1