Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5442ea6f9d4eb7e…

MALICIOUS

PDF

70.2 KB Created: 2021-05-19 15:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a2772124d1f972e6afc50891ab97da3e SHA-1: 2bf42b184cb7fc92c6867f206668b8f12412e283 SHA-256: b5442ea6f9d4eb7e18561cb1f1fb852d17332a7f6fad48e2925736cd065aec9f
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 phishing and scam operations. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/strik?utm_term=dogecoin+price+usdt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406775/normal_60207158024c9.pdfIn PDF document text
    • https://newadagunezadev.weebly.com/uploads/1/3/4/6/134684801/2431899.pdfIn PDF document text
    • https://xawewidijaxiju.weebly.com/uploads/1/3/4/2/134266046/4238090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401555/normal_5fc6ca84d3d95.pdfIn PDF document text
    • https://mabelemaje.weebly.com/uploads/1/3/4/7/134705401/tipusorevenewen_zazoseti_wuzapabutanow.pdfIn PDF document text
    • https://mebodamuruwij.weebly.com/uploads/1/3/5/4/135400263/1163324.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502464/normal_5ffd84451a885.pdfIn PDF document text
    • https://tofavasexivefet.weebly.com/uploads/1/3/4/5/134578877/disejeva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420013/normal_6000691153fc6.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/piwanisaj/66040997884.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/edible_mushrooms_uk_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/cpcc_staff_email.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/how_to_write_an_assessment_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc6e828e-358b-4c61-a518-b90a57c675b7/waxuwafawizijumadolizo.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/85473615365.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/7439565994.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/voice_recorder_app_in_jio_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3618775-f622-4bbf-a9db-c0f0a0d0dcc7/9180019188.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/center_point_scope_3-_9x32_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c45e13e-1bb5-4238-ae3f-e01f46c582c8/why_is_my_xbox_one_disc_not_ejecting.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/msi_n1996_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/platform_sneakers_dresses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3cff199-5ec8-47d3-b563-4f374349b25f/30461525710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90eea14e-7235-4d09-bc1f-1dc6dc85e4ec/estudios_de_caso_en_psicologia_clinica.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51D 5000 bytes
SHA-256: 86458ccef56700317d561bcd2b33c980555fbd6219999af2444558d14ffff365
font_01_sfnt_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 11244 bytes
SHA-256: d8858d5a0582ccb95852b48ac46fce671adde1de5c5301906ecf6f75b972aded

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