Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab4077451c5526ce…

MALICIOUS

PDF

65.1 KB Created: 2020-11-23 18:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6bff9c08c5dc3f543de5c9d64a6bac4b SHA-1: bc1ced6785858ed9ff99d7d760806d1036c405c0 SHA-256: ab4077451c5526ce831e1f62775e8407143a39d37322a0f1350e7c04fbc222f9
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-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://trafficel.ru/strik?utm_term=sivale.+com.+mx+consultar+saldo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449000/normal_5f9f818e81204.pdfIn PDF document text
    • https://zafitageleg.weebly.com/uploads/1/3/4/4/134489703/a05acb988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5f930850500a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425009/normal_5fb8297b60231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474218/normal_5fa8a52d50844.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/23002592372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e79b63b-e22a-4ea0-bbd8-868509b2e859/ninotatasojivoporob.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/45360475285.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/13093763787.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/advanced_learning_center_chs_login_tennova.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/ffiec_051_call_report_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/20076840025.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB529 5228 bytes
SHA-256: d79d7e2231e5c616f47defaff01a8235def17e7b89903d22419f3b0dd2d4c316
font_01_sfnt_off0000c6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CC 10236 bytes
SHA-256: 2a75fd7b10632f68ebca4b4bd95ef5711d002814c203f7452b279108cfcbf69a
font_02_sfnt_off0000e991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.