Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a9cd9687d1a9ce…

MALICIOUS

PDF

77.1 KB Created: 2021-02-09 11:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dc503e2f59837ee220808939906e662c SHA-1: f62e452ddaccf3e993dcbec7299a7aa094f75b43 SHA-256: e6a9cd9687d1a9ce789a57dc732162819d5129d049d4e2cd9bc4c1b48895eb23
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, indicative of a link farm or phishing campaign. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the user is prompted to call a number. ClamAV detection and ML classification further confirm its malicious nature, likely involving exploitation of PDF vulnerabilities to redirect users to malicious sites or initiate further compromise.

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/123?utm_term=netbeans+vs+eclipse+for+beginners PDF link annotation
    • https://mazefitarunakur.weebly.com/uploads/1/3/1/4/131453858/bewesidozaripixeva.pdfIn PDF document text
    • http://matroskin.space/158077725784er97.pdfIn PDF document text
    • https://wopadutizibum.weebly.com/uploads/1/3/4/3/134306931/mafimoveb_mofonafineb.pdfIn PDF document text
    • http://onlinetyz.xyz/spider_man_2002_download7djw4.pdfIn PDF document text
    • http://razvivatel.blog/safukunuduwupulubevudujcw687.pdfIn PDF document text
    • http://sfhgfje5df.xyz/nobelelbnz9.pdfIn PDF document text
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/fajedu.pdfIn PDF document text
    • http://lnstagramsecurity.net/61268310245seo9q.pdfIn PDF document text
    • http://doordash.link/how_to_test_headphone_mic_androidrlgnv.pdfIn PDF document text
    • http://storefromit.pro/36263162324fqv1e.pdfIn PDF document text
    • http://rameautbxy.space/236737746308h9uz.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/jolituzoji/givepanafibawiwejuf.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/suzap.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/67301376617.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/38713630525.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_off0000f1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DA 5352 bytes
SHA-256: 649961534451efc366a914f678ceaa55e81f63cd68bdaee8466c1ddf583a9a54
font_01_sfnt_off0001042f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042F 10296 bytes
SHA-256: f43a01059911d0d75bb044a83d9a21c6793fde570cc121b6b5ac01ea8675bbda

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