Malicious PDF — malware analysis report

Static analysis result for SHA-256 381df5a22e3ed79e…

MALICIOUS

PDF

77.0 KB Created: 2021-03-24 08:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f70ad05e2b50cdda70b94ba73e1d62c SHA-1: 81e65528f63ede0c302addee79f0fbe3ff900a1c SHA-256: 381df5a22e3ed79e772d5681ea06dc3c9f2630277913be7c5932fa189dbb0a7e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with a link farm used to obscure the true destination or to distribute malicious content.

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/wix?keyword=unblocked+games+6969+earn+to+die+2 PDF link annotation
    • https://cdn.sqhk.co/budijapa/eBjeneT/change_color_ps4_controller_pc.pdfIn PDF document text
    • http://rufajegenene.iblogger.org/homer_iliad_book_2.pdfIn PDF document text
    • https://cdn.sqhk.co/xupixawina/yPgfzhf/roxiparaniwavejaruz.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/heJpUhf/warhammer_quest_silver_tower.pdfIn PDF document text
    • https://cdn.sqhk.co/xepiriza/figchfo/15099123370.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/Ogghggg/2558166111.pdfIn PDF document text
    • http://mosquito.codes/88481332623878vy.pdfIn PDF document text
    • http://towumodoxilokox.22web.org/molecular_biology_of_gene_watson_7th_edition.pdfIn PDF document text
    • http://pedrons.space/endocrine_system_disorders_concept_map9gd1r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_5fe75a79da80b.pdfIn PDF document text
    • http://prizinsta24.site/lurifulikds3qc.pdfIn PDF document text
    • http://study-english-04.space/tevoninewn4sv9.pdfIn PDF document text
    • http://natfreshik.fun/tamuzi7bzhs.pdfIn PDF document text
    • http://winopajabareze.22web.org/asheron_s_call_leveling_guide.pdfIn PDF document text
    • http://flebolog24.com/jagabiwezjhkzv.pdfIn PDF document text
    • http://fakts.design/strategic_advertising_management_4th_editionwcb3m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402014/normal_6001db1064584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370764/normal_600d03f17cb22.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/firudegix/71584668611.pdfIn PDF document text
    • http://mufifofoge.epizy.com/sosemojapebek.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/tudemijukomi.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_off0000eef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 5896 bytes
SHA-256: c6d40664859acd28b57ba5bbbd533d38a6454b3e01265ef6e0ccba5cce1749f4
font_01_sfnt_off000102df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DF 10592 bytes
SHA-256: 87e20d9ccf8fe55b4729e71142c27afcebeda8fe8e3df549dcf3ef657973851c

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