Malicious PDF — malware analysis report

Static analysis result for SHA-256 9540e7b28ce8a748…

MALICIOUS

PDF

71.9 KB Created: 2020-11-11 21:25:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3f002f249ac6cf3406def9cf908cfeb5 SHA-1: dd9434df29ae4959636612ac96516044388f3a1d SHA-256: 9540e7b28ce8a748cf39494127fb195bcc2e0623b28b2257f3b11e8c79e967ab
176 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/strik?utm_term=android+box+h96+max PDF link annotation
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/bufagutaxu.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/fazirokij-walofelavoz.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/vifowisezifejega.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/bidagalugukon.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/kagedatabujo/vatizepibaxadolapebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc49eaaa-69c0-4eee-ba8b-f5a73fb9b1a6/where_is_the_scp_foundation_located_at.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/xerigogobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb3ba92-b348-4cbf-9c28-e0276fbc2b59/test_bajo_la_lluvia_interpretacion.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/sisisutujupaweb.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/words_that_start_with_sant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ae75d2-0763-464f-95c2-503e4ecd3d83/loguweji.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA44 5360 bytes
SHA-256: 3a3481431f87f15af92be46762ed95f29ff925356f62ebcf09a1c160142aac9e
font_01_sfnt_off0000ec4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4F 11440 bytes
SHA-256: 647958674268c9d1ec8bd314264d475101da9f95f3438aa35a01be16c09b30df

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