Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf0bdede2840ff6…

MALICIOUS

PDF

80.1 KB Created: 2021-05-22 00:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9dd08627f98fedf5b65d9538c309f5af SHA-1: 256b33da381bd31c0c9f0d0a7aaf1fcaa9b81b08 SHA-256: adf0bdede2840ff6242546da4f45ed052ee4f12d9053f5d9c7c8ea6b4d09ce2a
176 Risk Score

Malware Insights

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

The PDF document contains a lure related to resetting a Sprint account PIN, directing users to a suspicious URL. Heuristics indicate a link farm and a callback phishing lure, suggesting a scam or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://maypoin.ru/strik?utm_term=how+to+reset+my+sprint+account+pin PDF link annotation
    • https://ruwagifixub.weebly.com/uploads/1/3/4/0/134013037/8081888.pdfIn PDF document text
    • https://xemakoxen.weebly.com/uploads/1/3/4/3/134320116/153311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_60109c502f2a5.pdfIn PDF document text
    • https://ruvawigalovenu.weebly.com/uploads/1/3/4/3/134318686/7857869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472501/normal_605ba3e0dfa65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483867/normal_60592452930c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480155/normal_6063467ebce42.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/zudoxumowu-keladigunuli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408330/normal_5fe56aebef3fb.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/ladojenefe/50925360979.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/pipidusalomukizenulonug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddcf69f9-9105-42ea-80f8-2272ef346963/8633941911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f7a64a-d4c4-473e-9c67-26b7b6e62630/warriors_the_last_hope.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/how_to_reboot_cisco_router_from_cli.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/kebufowaxoduxafupeki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e5e5195-9670-4700-a409-3cea057bc4c8/what_to_say_in_a_nursing_assistant_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/wojoniro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1069bcf3-7ef7-4297-8e6a-04978f7278f1/first_alert_3120b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/826d2a4b-6d2c-405e-8e28-7c270dbeba79/execution_the_discipline_of_getting_things_done_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/maxalav.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/bejefubesovesokeni.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/how_do_i_connect_my_apple_time_capsule_to_wifi.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_off0000facf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACF 5204 bytes
SHA-256: 11a08cde5729d4cef5a91b8402c0e33ce057b12db9c2b83493d50e9e7ce7c70b
font_01_sfnt_off00010c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7D 11200 bytes
SHA-256: ece138b5738671225db64e04a574409e320732a18bca755c6867661531531c45

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