Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a306a45682279a4…

MALICIOUS

PDF

79.0 KB Created: 2021-03-22 18:10:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 713186c8aa80eaa9b073b7c13ca99df5 SHA-1: 3e39f7577678f12ff85a51a03b2399ff1d299e1a SHA-256: 3a306a45682279a49493389bbc776b12db09a27930c58b0f7f7c5e71fc77ae08
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://xezojetit.ru/strik?utm_term=little+fires+everywhere PDF link annotation
    • https://cdn.sqhk.co/jagapifa/8hcC4q1/android_sdk_manager_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuzoda/dxghhgR/cartoon_wars_gunner_gold_hack_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485321/normal_6032d80ed5fd1.pdfIn PDF document text
    • https://cdn.sqhk.co/jifedibodo/7ggw8va/piano_keys_labeled_with_notes.pdfIn PDF document text
    • http://nafepuzemobir.sportsontheweb.net/66365934345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419847/normal_6051ef4d53dc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408343/normal_601b0cca65cd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369165/normal_6007e32f68d9d.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/aibjhie/vector_robot_subscription_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5fe80350c54b2.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/illinois_corporate_annual_report_form.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/vukusa/astm_steel_sheet_pile.pdfIn PDF document text
    • https://ab0007c4-58ca-4db2-ab23-686bae4d53c1.filesusr.com/ugd/8bf248_322c7ef40f224997b5ad58518fc768fb.pdf?index=trueIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_c482990651214a96bc90ba29545de564.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novifamigot/all_scripture_is_inspired_by_god_nkjv.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/50856190448.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/oca_oracle_database_sql_certified_expert_exam_guide_exam_1z0-047.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/zuvobakijemunosawuloko.pdfIn PDF document text
    • http://xotaferuju.myartsonline.com/nespresso_aeroccino3_milk_frother_blinking_red_light.pdfIn PDF document text
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_7ac96f934fdc41639e5dc6d83a4a68b0.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 4412 bytes
SHA-256: 1a2aa1be204c323275fc7a19dc06a3b8ba573346fe8f1c1cd8b42951b35fafd8
font_01_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 10596 bytes
SHA-256: 7655fa3afddd1f1afd5d5d72f805fe3846d4f01c636a3a197ea2dd6a44d1ce4c
font_02_sfnt_off000120dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DD 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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