Malicious PDF — malware analysis report

Static analysis result for SHA-256 664d50ae1a0794cc…

MALICIOUS

PDF

117.0 KB Created: 2021-02-13 22:19:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9e6f5f5c6e0256e20fda158d3b350f53 SHA-1: 5540c5677d02db549182a24df35af4d29d539a89 SHA-256: 664d50ae1a0794ccbe7934392b9439478b7d0ce9fd1a634da08a478413d3e3ce
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious websites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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=trust+deed+format+in+gujarati PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490547/normal_5ff3c45bb980c.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/QJZjbih/gilepifamafa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366405/normal_5fff7f20e9243.pdfIn PDF document text
    • https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/dc71a6c6e2cae73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417806/normal_5fcff1270f9dd.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidofajug/2XODcCD/custom_maps_minecraft_switch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449421/normal_5fdb32d4d52d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454436/normal_5fd705bfb8ea5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381320/normal_5fc9a4916b4a4.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/Kk7ibo5/tachyon_vpn_app_store.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/fapaga/4g_lte_network_extender_2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/contract_agreement_format_between_two_parties.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/c_est_genial_french_book_11th_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/report_power_outage_eversource_ma.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/newilovezakuxek.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/87190853381.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/dumelixizulegesuziw.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/56351085940.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_off00016f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F51 2828 bytes
SHA-256: dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21
font_01_sfnt_off0001794b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1794B 5220 bytes
SHA-256: bc41a92bf37cf3193c0bbe5e75243d565ff337f4b4292c39459310908a271c17
font_02_sfnt_off00018af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AF6 10620 bytes
SHA-256: 37e9b3ba51c9fcfc3d1cf27d30fd8df77375257091b221471b18b7ee7ac863bb
font_03_sfnt_off0001af8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF8C 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1

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