Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1db84a244ac094…

MALICIOUS

PDF

98.6 KB Created: 2021-05-16 18:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3dd03b5567ce7d383015ef2e8764b9e4 SHA-1: 5905eac8c9a1a3d46e10750b205a59705e63034e SHA-256: 8e1db84a244ac0943468e282ada6046aed7adc3cd0dd70437ca66eb7a3089c66
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 0.9995

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://fokemale.ru/strik?utm_term=flowers+for+algernon+setting+quotes PDF link annotation
    • http://levotavo.scienceontheweb.net/84529314373.pdfIn PDF document text
    • http://spencermcman.us/cinderella_chef_osthqtis.pdfIn PDF document text
    • http://netewe9.xyz/mevupivudozaseksom0d.pdfIn PDF document text
    • http://hotsgirls.online/rofiretofaguwaxu6eti9.pdfIn PDF document text
    • http://remontlegko.info/solinuluxewutoxula7ce.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/54974625882.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/where_to_buy_republic_of_tea_bottles.pdfIn PDF document text
    • http://songkfrk.site/how_long_should_a_trane_furnace_lastem6w2.pdfIn PDF document text
    • https://xisifogobodi.weebly.com/uploads/1/3/4/7/134735845/44ae4a165119bd.pdfIn PDF document text
    • http://ig-copyrightnotice.com/why_wont_my_samsung_tv_remote_change_channelsn3c0h.pdfIn PDF document text
    • http://gonzo-3d.com/vumediu1kgg.pdfIn PDF document text
    • https://garowowo.weebly.com/uploads/1/3/6/0/136033653/1880665.pdfIn PDF document text
    • https://kedosesu.weebly.com/uploads/1/3/4/8/134853013/sojiriwelapoku_dojumixafaz_puwom_jipogixose.pdfIn PDF document text
    • https://xuvitekopa.weebly.com/uploads/1/3/2/7/132712193/8553162.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://appletopshop.ru/rexunixotelaradizibobexvxl6.pdfIn PDF document text
    • http://bluhgang.best/believer_imagine_dragons_video_songt4w2k.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/vavumagonakalad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b4e79a3f-0083-4b26-8056-4fe87fb46dfd.filesusr.com/ugd/332c1b_6330baa17d864020a938bf901a329560.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa073107-88fa-4e07-b9ca-f1800e5dd0d0/look_to_the_east_lester_hardback.pdfIn PDF document text
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_89038acd1d53422ebfb814d832b31895.pdf?index=trueIn PDF document text
    • https://d7301f0f-9730-4f6e-9d95-601e203cb770.filesusr.com/ugd/253413_efbcf8e419444cb0b03b1f9eeeda9c82.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fbc84ee-e5d9-4b6c-8e81-44a69cb65917/fatonikuro.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_off0001473b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1473B 5108 bytes
SHA-256: 0a4259121a7a14d5665bd289f4d20d9a9ae82a8c50fa30d52f53bc81efd7efb7
font_01_sfnt_off000158be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158BE 10724 bytes
SHA-256: 7caa549b0dc9f7db8ee1a0b9dd650c1d34ddc607ee0524cbcb673f9d2be4720e

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