Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc95f7ea876b386c…

MALICIOUS

PDF

69.5 KB Created: 2021-03-29 20:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6fe88450d10377a9bd325417527c9b9f SHA-1: 950092eae7ecb5124099bccf9df9652bf13b258d SHA-256: dc95f7ea876b386c841940e7869d93771c49723286ac9ad8e850057b3085a534
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 0.9997

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://druttle.ru/123?utm_term=past+simple+vs+present+perfect+exercises+pdf PDF link annotation
    • https://cdn.sqhk.co/zotofoza/ggqJRaG/chinese_checkers_online_mobile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_605c993933979.pdfIn PDF document text
    • https://vomodubezu.weebly.com/uploads/1/3/5/3/135398809/418e2f55.pdfIn PDF document text
    • http://qlemelest.online/43069220231cna51.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/do_recipients_of_social_security_get_the_stimulus_check.pdfIn PDF document text
    • http://lamanixumerad.mypressonline.com/como_instalar_camera_de_segurana_residencial_passo_a_passo.pdfIn PDF document text
    • http://winoraama.space/cisco_encs_5400_datasheet0yjfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476001/normal_5fea35fed5640.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478137/normal_5fe1c22173285.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/jjQjc3Z/zilurefubajuvokikewofil.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/one_step_addition_and_subtraction_word_problems.pdfIn PDF document text
    • https://jebunofom.weebly.com/uploads/1/3/4/4/134468214/857805.pdfIn PDF document text
    • http://stepka2016.xyz/the_official_sat_subject_test_in_biology_study_guide_college_board_official_sat_study_guide032pf.pdfIn PDF document text
    • https://kedixusivazusug.weebly.com/uploads/1/3/4/8/134869684/a6f2aa5f5b2dc.pdfIn PDF document text
    • http://all-casino.xyz/ultimate_guide_to_time_lapse_photography3mpna.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/hjZkGig/fidget_spinner_ring_canada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pefimubis.myartsonline.com/guzugutejifabike.pdfIn PDF document text
    • http://xawixojupaxixan.onlinewebshop.net/ashrae_standard_55.pdfIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_2740b5f94ac84ca9998835a60124a400.pdf?index=trueIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_94a6365c306e422c9195138adade791c.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD306 5428 bytes
SHA-256: 8572030b7491577736221fca85a497b82c86a750583f1f1197360ca4bdd8534f
font_01_sfnt_off0000e56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 10224 bytes
SHA-256: c436b47d39a748e02e2ed9a04e9adca41f1ff7a603fe40255a69777814e1214e

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