Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0526b91856abd7…

MALICIOUS

PDF

66.1 KB Created: 2020-11-11 21:17:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9252c713ad4da8cbe9e9d60f8d2dd357 SHA-1: 75ed5280421f80680d8b08ac857f5babe2e339f9 SHA-256: 1d0526b91856abd7a6ad94e55949894895fba9860d28be9a142f9a9a53bc3881
186 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. 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=hahri%2527+s+lumpy+boardhouse+season+2 PDF link annotation
    • https://rajutusila.weebly.com/uploads/1/3/4/6/134666313/1ae3f7907.pdfIn PDF document text
    • https://metumarexidema.weebly.com/uploads/1/3/4/5/134591821/9612329e.pdfIn PDF document text
    • https://bojemesazam.weebly.com/uploads/1/3/4/5/134598919/23a670aa.pdfIn PDF document text
    • https://xojuliwujugiseb.weebly.com/uploads/1/3/4/3/134388488/8176865.pdfIn PDF document text
    • https://kaxalosenawa.weebly.com/uploads/1/3/4/5/134576513/7196014.pdfIn PDF document text
    • https://gupugeja.weebly.com/uploads/1/3/4/2/134235999/sajerawepidi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b8d8f12-a2ed-4d2a-9536-23f4ce11bd53/tamizumozukadadudud.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/biology_taxonomy_and_classification_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d4afea-3b66-41e7-b576-5a9e65075622/7663892817.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/how_to_spit_out_water_in_mope.io.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0281ce06-1670-42b6-881e-273ad52cc317/13160610438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7784aac2-e69a-462d-9cca-cbf70f2ded6a/fimawawugalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b491c875-efda-4331-a66f-9361a9dc9f5a/the_crucible_symbolism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa446ccb-b08a-4c70-9899-8cd5c420304b/shift_head_worlds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be614105-a877-4ad4-bd35-f1846ef42562/62322868968.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF9 3108 bytes
SHA-256: f744fa1525166f8ba771b70f6037277a5b693cc0ab5be3cd5cd0a51f8a72b81a
font_01_sfnt_off0000bb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB25 5568 bytes
SHA-256: 588d0ce262765a65efe69d87d6df36990f20502b728b105ea3ccbafe635f8b4b
font_02_sfnt_off0000cde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE3 1936 bytes
SHA-256: 246569b5fd7226bd0ebf3c016de7ba0bf82e996896d660a08030b2af0a08efd3
font_03_sfnt_off0000d724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD724 10456 bytes
SHA-256: 962d410ccfa6c7701562e583a94bb86954375206b7c7975b8a054a96049814d5

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