Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ed92dcb05e0ec4…

MALICIOUS

PDF

99.9 KB Created: 2021-03-20 11:44:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 636523540a6714f323ed78f5329dd6fd SHA-1: 498e5653017eaa74cde12f92957115c3844a60ae SHA-256: 75ed92dcb05e0ec4330e4b38509024707c5410ed6ab230278f4f9ff35421f1ba
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The presence of a 'download button' heuristic and a critical ClamAV detection further supports a malicious classification. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/123?utm_term=whatsapp+video++2019+3gp PDF link annotation
    • http://mufutekuson.getenjoyment.net/xokupawufebilobew.pdfIn PDF document text
    • http://sowakowakemim.mygamesonline.org/komplikasi_avian_influenza.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/12966532988.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/jotafobulubu.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/vampire_diaries_quiz_who_is_your_best_friend.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/aRa2ghk/guess_the_emoji_movie_edition_answers_level_2.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/20069157708.pdfIn PDF document text
    • https://cdn.sqhk.co/dulunukosep/iijdjiz/fusion_360_mac_crack.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/7011650.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/gimufesajo/fact_sheet_world_health_organization.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/66213868129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27102215-e5ce-4d32-b685-b3927d65802a/what_is_the_fastest_way_to_learn_russian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9315cbd-1edc-464e-afb5-03c7e96c00fe/sanyo_dvd_vcr_player_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bce6d17-a05c-48c9-8745-9e8dbb39a31c/bidosoxuxusiralenatejak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6363ed34-051d-4e0c-a571-dfa5fe6f177b/wibami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e52a4a-da48-4649-990a-d16406b1df43/sevavutepoxalezatupipiti.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/conversion_de_1_2_pulgada_a_milimetros.pdfIn PDF document text
    • http://kedokonox.rf.gd/5233028156.pdfIn PDF document text
    • http://bezexus.rf.gd/46671055853.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/vulurofuxevesuwinolugozu.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 10008 bytes
SHA-256: c89a3febbcf9fc5614f5785ced675b2e28c4045e4976473deecb17d4de5c66f7
font_01_sfnt_off00010b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B79 2988 bytes
SHA-256: f244152f1735ecea2e0015db16f4eec7c19935d3b03785c1fb693a5a6caaf07b
font_02_sfnt_off00011629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11629 5812 bytes
SHA-256: 3f8af0a85985c3323aa23de37c07f0f5689fc5fb510d678816a5cf683db2920c
font_03_sfnt_off00012a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A02 6632 bytes
SHA-256: 96dbaee8c6e25108e3942233d92ed32c2e5fc5fac8b77227b5b2464b3f79cba4
font_04_sfnt_off00013ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFE 10920 bytes
SHA-256: 4d257ff21a62b9225013dfa566fad3e0c97a26bb70506161e7718680edee091b
font_05_sfnt_off000165ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165CA 17192 bytes
SHA-256: 0a7072fe9d23c1f333ba8d1cf6a486622661fcdc531879a99f9ca998a257f0b1

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