Malicious PDF — malware analysis report

Static analysis result for SHA-256 5576df91315e44a6…

MALICIOUS

PDF

81.7 KB Created: 2021-03-01 13:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 06b6d292eac9c054a4a887ab05da92f9 SHA-1: e5f4cb29fa21d76545f822997466391c5aab8e87 SHA-256: 5576df91315e44a6ef9c3f7c355d759e4d9b11fa4712ad8f7bcb3bdf1271d9e7
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 0.9998

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 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://seumenha.ru/wix?keyword=fifa+17+apk+data+android PDF link annotation
    • http://zedateve.mypressonline.com/how_to_make_a_puerto_rican_pernil.pdfIn PDF document text
    • http://uaregroup.com/giwejepuwumulawudijugy1wm.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/56996848773.pdfIn PDF document text
    • https://rajagoka.weebly.com/uploads/1/3/1/4/131406288/6706881.pdfIn PDF document text
    • http://startbastar.online/advanced_algebra_trigonometry_and_statistics_iv._2003lb0ix.pdfIn PDF document text
    • https://fekugutupufug.weebly.com/uploads/1/3/4/8/134876907/kafufixilalivor_bomew_dagugepes_favesosirewasax.pdfIn PDF document text
    • http://xasujaru.22web.org/because_he_lives_sheet_music_with_lyrics.pdfIn PDF document text
    • http://copyright-central-media.com/19706208515fojp6.pdfIn PDF document text
    • https://jupurelapuloful.weebly.com/uploads/1/3/3/9/133997255/rusiw.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/boy_scout_store_medford.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/what_if_cronbachs_alpha_is_lowar4pz.pdfIn PDF document text
    • http://kotuputepoworug.22web.org/29979871784.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kobamozikepaxip.rf.gd/bovobena.pdfIn PDF document text
    • http://zenejifawulo.epizy.com/jnc_guideline_hypertension.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/dolinorozagade.pdfIn PDF document text
    • http://nivuzujanux.myartsonline.com/wiwex.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/26380637896.pdfIn PDF document text
    • http://salogun.rf.gd/atwood_hydroflame_furnace_wiring_diagram.pdfIn PDF document text
    • http://piwolimosopobu.myartsonline.com/fexubugobasup.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_off0000eeb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB1 4976 bytes
SHA-256: 500a08a5ce1c7b02efecdfa0529f9436e3f51d12296278b43dbac33b4fd45ac7
font_01_sfnt_off0000ffc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC9 10912 bytes
SHA-256: e9583b4279ac32ca70ee1e2f586d3584cb0cf3503b0178c92c652fee62599dc9
font_02_sfnt_off00012475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12475 16204 bytes
SHA-256: 97d284a3855420cdbdae34860f31dacc38605590ea495453bf7f5ba3a9d42ecf