Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d609a13ce1c7384…

MALICIOUS

PDF

72.1 KB Created: 2020-12-18 16:29:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 27e298301c567b64322266892a33f39f SHA-1: ddb0d3119504ec65748fe089a0b412e8d4165c59 SHA-256: 9d609a13ce1c73843c45ab87fd1ef525c0de9417ef1c7fdb508a63c9a473b0aa
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 0.9972

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://traffnew.ru/123?utm_term=five+star+eco+city+long+an PDF link annotation
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/sotorirazajedi-turajotatufa-rosuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484618/normal_5fab5ea786f30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5f90a38ea0646.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/nerugiraxura/48780434163.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/20994887524.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5389b8139af0376616de8/t/5fcfd460053015467a42530a/1607455841317/frontal_gaming_shop_diamond_ff.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/39656005792.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52e78bda9c57a97da122f/t/5fc637fda97599144eccfee2/1606825982715/74889062096.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/zexotaluxavikupasole.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn 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_off0000d118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD118 5084 bytes
SHA-256: b38aa24e191077a4888eda1cd093629ccc608f457fb813600a662baa543e1e2a
font_01_sfnt_off0000e282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE282 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000ede5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE5 10628 bytes
SHA-256: 0ffad82d837312bb6d4922b98ee6929883b6505dc6700c9e45ff6e18532a9f6d

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