Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4b5542e617e3f0…

MALICIOUS

PDF

77.0 KB Created: 2021-03-20 23:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 57e33ebfac54f897a1718f4aebe4473a SHA-1: 72775c5661b6fc8c1bf36b9a97275f81f8e7607f SHA-256: 7c4b5542e617e3f0088bb41c55dff6ddb400a7038db00a653772e1d719b11e61
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-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://leonvi.ru/123?utm_term=deck+baluster+spacing+template PDF link annotation
    • https://kosopewoxi.weebly.com/uploads/1/3/5/3/135318270/lobej.pdfIn PDF document text
    • http://vbnmcxz.xyz/pride_and_prejudice_and_zombies_dreadfully_ever_after_movied8o3u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_604fc6aedd086.pdfIn PDF document text
    • https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/vokapopefuwojeza.pdfIn PDF document text
    • http://krepezh.guru/philip_freneau_the_wild_honeysuckle_meaningks1gd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_600d4fe957081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_600facda115cf.pdfIn PDF document text
    • http://creditreportus.info/wewexodeledomevasixozazu2dsw9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471996/normal_6047c72ea99de.pdfIn PDF document text
    • https://muxasikij.weebly.com/uploads/1/3/1/8/131872285/bebd0769d27d3f.pdfIn PDF document text
    • http://jitokinut.iblogger.org/72969017540.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451044/normal_5ffed2fea1812.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geluzejezi.epizy.com/alina_baraz_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/637bee32-da91-46eb-a3c5-1d8ad5b87469/why_the_sky_turns_red.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374af99a-c829-479b-9072-8f15329d1276/sateva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e960eca-35a4-456b-9126-a91a51d58861/mizesevipaxubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212e79f2-2d1a-4614-92cd-a0713af5473c/lg_v20_wireless_charging_back_plate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/504889bb-cada-4735-a72b-3cf4090da17e/what_is_the_difference_between_general_purpose_and_specific_purpose_software.pdfIn PDF document text
    • http://negifunowulag.rf.gd/83201830548.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_off0000efc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC1 5456 bytes
SHA-256: ffa440ab952008ad4b9f5dd14f602361b21f54c9404bf655cb13a972ba3b2a11
font_01_sfnt_off00010245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10245 10684 bytes
SHA-256: bddaa40b8c22b2521154a9bff74122495cefa0fd152ae395ec1c7c51f9d9eae5

Open this report in the interactive analyzer, or submit your own file for analysis.