Malicious PDF — malware analysis report

Static analysis result for SHA-256 c180360c2c6f9dde…

MALICIOUS

PDF

74.6 KB Created: 2021-03-15 07:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 46e3293abf17b1b9a31e392f3d4ec840 SHA-1: 50876ace10ac3f17dc650735a36adb041dab2017 SHA-256: c180360c2c6f9dde96e009b066ad0a72f86fe5d3967b6d7e4db7ee65ec3f590e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely to redirect users to malicious sites. The embedded URL 'https://dafemum.ru/123?utm_term=brain+teasers+games' is a primary indicator of this redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://dafemum.ru/123?utm_term=brain+teasers+games PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385021/normal_5fe3d832358fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_601d5f0e930b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_5fd3181b1c14c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_604182e87cb3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412897/normal_5ffd4544e9e29.pdfIn PDF document text
    • http://gatorama.space/how_to_make_a_cape_with_hood_pattern0ccxl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489713/normal_5ff93d5d29daf.pdfIn PDF document text
    • http://lilowivewumo.22web.org/kenneth_wayne_hagin_net_worth.pdfIn PDF document text
    • http://ibkreactiva2020.com/susukasanilufegemoluvtmle9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5ff8c0542239c.pdfIn PDF document text
    • http://7lessons.space/bible_dictionary_apk_offlinev1hck.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401983/normal_603bbe67de32f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478685/normal_602c719bd46c5.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/c8a44eb2-5c02-45f5-9050-82ea78956a69/berkeley_review_mcat_biology.pdfIn PDF document text
    • http://disemetizoxexo.rf.gd/satusukelutedanusafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1542e1ea-5d62-4621-901b-81af1f01ef9b/800_words_series_1_episode_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c19d39e1-974f-4baf-9416-7ccd5b87acf3/hydro_power_plant_flow_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2614d62-c8a4-4734-ad28-6da794dad796/what_is_qms_subwoofer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c94bd36-aadb-42cf-b032-2eda5557389d/gtn_750xi_trainer.pdfIn PDF document text
    • http://bagozorox.rf.gd/how_to_start_the_heir_of_memories.pdfIn PDF document text
    • http://dinoxisajuz.rf.gd/56845587008.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DC 5020 bytes
SHA-256: 7d5be495c4aa71c93add436f52f783bb1a23c456a15f278543d862a5539f5a96
font_01_sfnt_off0000f8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DC 10812 bytes
SHA-256: 8dbe8c422d4d04a0c883dab7a4e6c50848435bba438d6549c13af6a9f0f7624b

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