Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa4f22832408565…

MALICIOUS

PDF

72.0 KB Created: 2021-03-30 17:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f7c91c5e4b8b1024dcf89e01457e8e80 SHA-1: 0eeba058e570dfa423e3141f4e14a93ff25e87de SHA-256: 0fa4f228324085652999f9d9707a05a93f3696320762f0f15647a86efc4adfc2
156 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 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 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.
  • 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://jottigo.ru/wix?keyword=champions+3d+unblocked PDF link annotation
    • https://cdn.sqhk.co/jopubelo/RZ40ifH/budunodedepobumejatanopig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_6027bca52334f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487381/normal_601f29ec39a2b.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/gckahcf/offline_gps_for_android_auto.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/fihqib8/geziwezenojasesikigus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374376/normal_5fdb6303e7a96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422367/normal_6029c4a849e56.pdfIn PDF document text
    • https://cdn.sqhk.co/lukulobu/ijB3jhm/motogp_race_championship_quest_mod_apk.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/mubemutolewe/avanza_g_manual_2012_surabaya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a09e53-4390-4379-b039-761fb58b8d73/35462423710.pdfIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_8b76fa276ece447cb39d84191f07d6fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/812a70d8-60fa-4e17-b5f0-8b9c20e67c71/is_the_i_ching_the_same_as_the_tao_te_ching.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d18593d-d07d-447b-ab35-bac44601e0cf/best_tech_stocks_under_20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2afc567e-fa81-4220-bee3-556213b2ee8c/61356916263.pdfIn PDF document text
    • https://33da92c3-26de-4f6b-bf12-1693cb6a6e79.filesusr.com/ugd/0307f2_7872621a76b7449baf54e700f5bd0289.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/jojituwaduramemakumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e4dbe9-eef3-4480-bc4f-4bf6c3191290/tirevagubozulezaxoxod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48e99f19-2b9b-4c62-9294-f7b573fd8ceb/motorola_xts_2500_battery_eliminator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a616153e-fdd0-48c3-bcbe-265db17c2851/what_is_classical_greek_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c396d99-d8e6-43e2-a01a-61e6be53e105/94_honda_accord_lx_parts.pdfIn PDF document text
    • https://0404cab7-c021-4537-be79-420bcb2f88cc.filesusr.com/ugd/52c240_cb05df951acd45b19073c9b9cc260938.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE93 5492 bytes
SHA-256: c6c1628aa7cc19f3a4f72a8b1ace7df54843f61213401ce59f6e86ff1f83f28e
font_01_sfnt_off0000f10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10A 9988 bytes
SHA-256: f1ab2442b6016af9b34702490b4a02a632fdf4002885bf3cc74545ebf6d3ad34

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