Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b95735c7227d9d…

MALICIOUS

PDF

79.8 KB Created: 2021-06-07 18:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e53228765cc429ecf069e78225b39c8e SHA-1: 407a5386beac5bea430459fccff56b0c1038fd7a SHA-256: c1b95735c7227d9dfe019d9ec44558bb0077fad00a4cd06c4208a3d812b9b8c5
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external links, with one specifically pointing to 'https://archism.ru/pbw?utm_term=amway+water+filter+user+manual', suggesting a phishing or credential harvesting attempt. The presence of multiple links on disposable hosting and the use of UTM parameters further support a malicious campaign.

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://archism.ru/pbw?utm_term=amway+water+filter+user+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409796/normal_60020f2d3ae58.pdfIn PDF document text
    • https://bedimeni.weebly.com/uploads/1/3/4/0/134016729/vupeporum.pdfIn PDF document text
    • https://sonalopuxarore.weebly.com/uploads/1/3/4/3/134310538/6048561.pdfIn PDF document text
    • https://sapixokevabose.weebly.com/uploads/1/3/4/4/134498139/sunemi-rurojugo-latazifanim.pdfIn PDF document text
    • https://buvedanazifom.weebly.com/uploads/1/3/4/8/134876279/3508543.pdfIn PDF document text
    • https://sifufunozomelu.weebly.com/uploads/1/3/4/7/134764248/2114236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423137/normal_5fd97a5ed4640.pdfIn PDF document text
    • https://rujizubag.weebly.com/uploads/1/3/0/7/130776042/6ba6a.pdfIn PDF document text
    • https://linefalaxig.weebly.com/uploads/1/3/2/6/132682404/061c745021300.pdfIn PDF document text
    • https://nakebakij.weebly.com/uploads/1/3/5/3/135339599/961180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500440/normal_6059b41d1af29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lorugaz.pbworks.com/w/file/fetch/144654954/que_es_la_fuerza_en_educacion_fisica_segun_autores.pdfIn PDF document text
    • http://zufiwuz.pbworks.com/w/file/fetch/144456459/ielts_general_training_writing_task_2_sample_with_answer_2021.pdfIn PDF document text
    • http://nusometa.pbworks.com/f/75049956529.pdfIn PDF document text
    • http://vamafob.pbworks.com/f/sentry_safe_wont_open_with_key_or_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65965f05-7114-4a2e-a9aa-36abc4931d30/how_to_meditate_pema_chodron_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46196f16-6ebf-4b96-8453-1c9afe820c18/how_to_you_say_welcome_home_in_dutch.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/26199662437.pdfIn PDF document text
    • http://supijexed.pbworks.com/f/86820114985.pdfIn PDF document text
    • http://tojasakamu.pbworks.com/w/file/fetch/144604215/filipino_wedding_hashtag_generator_free.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_off0000fa40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA40 5096 bytes
SHA-256: 4c8b982f6dd380ad76d69a917489bacc03fb3782de0116f7d896fe231ba5e63e
font_01_sfnt_off00010b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B97 11136 bytes
SHA-256: ca2176a5609d6f4fa0ccad9744fa2269ef687807bab01fbe75c757713e7db30d

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