Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e56e1a1b8f8d5a5…

MALICIOUS

PDF

113.5 KB Created: 2021-03-10 23:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6e054ce2a2a1b645676b0a1626fefc8f SHA-1: b30ec9a734915ba2af07e3e115bbde4fa29ccf92 SHA-256: 4e56e1a1b8f8d5a53f3dddbb10d9bc2c0e826f289c475a7c727784e6c8f1159a
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://xajibur.ru/123?utm_term=the+beatles+albums+free++zip PDF link annotation
    • http://vizit.store/garmin_nuvi_750_pricej8u8g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_6046343b5079f.pdfIn PDF document text
    • http://gunurovidoz.iblogger.org/jirerufixufarir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377908/normal_5ff59ad3cb545.pdfIn PDF document text
    • http://vittorguxx.site/405641321623vxh1.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/dorojiwujegurikad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463005/normal_602efd83f036e.pdfIn PDF document text
    • http://qqkaxes.xyz/philippine_flag_coloring_worksheetzpi7m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408462/normal_5fdb6db010c97.pdfIn PDF document text
    • http://wokelegekak.66ghz.com/konaputunupamigas.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/97256886729.pdfIn PDF document text
    • http://gazizelasama.getenjoyment.net/vampire_the_masquerade_5th_edition_core_book_download_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414500/normal_6043edc912159.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_621896eb5dd8496d97282ef408204a93.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/timeziso/samsung_french_door_refrigerator_not_making_ice_after_reset.pdfIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_401f3e0b8b154319a98d2c132930a401.pdf?index=trueIn PDF document text
    • http://fojisar.rf.gd/mechanical_engg_fresher_jobs_in_chennai.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/sap_view_balance_sheet_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/camera_360_lite_paid_apk.pdfIn PDF document text
    • http://gukasitaxe.epizy.com/bhojpuri_dj_remix_mp4.pdfIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_9c258cdec49e41faa40ee242daf4609d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woneketelak/60868615983.pdfIn PDF document text
    • http://kimawawasero.onlinewebshop.net/how_to_setup_linksys_wrt54g.pdfIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_6deb0dcdfc684f3ca3ed8815accf453b.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_9a1266b95c6f448a8e4471711fec1acb.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000191d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x191D8 21480 bytes
SHA-256: 122340bcaa36028bd7718f26b255c8d11113f647ca6ceb2c333790d33eea3b37
font_00_sfnt_off0001461c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1461C 3544 bytes
SHA-256: 8dda64b9576b56070552a718441fa948dde1f936ea88321da16e7b1b9cc42eff
font_01_sfnt_off000152c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152C9 5280 bytes
SHA-256: 393375fe598f9ff0443339690aa4eee96ffd99b882aa27724bede3eeaccac3a7
font_02_sfnt_off00016498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16498 14032 bytes
SHA-256: d01bd86c1356f78086df5508be17c7a6f5e21a7dd4d3b922d867b41e47d5fd4f