Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8594aacafc295d2…

MALICIOUS

PDF

79.9 KB Created: 2021-04-19 14:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f3295dc9188c1392d48a347e1c2339d6 SHA-1: 5c73209ac64f9cc216f0b342568712f5230a6cc3 SHA-256: e8594aacafc295d28fb3faeb6e3d7130c4aa1e8b7498d19bda03ffb40dbde9bb
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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=confessions+of+a+shopaholic+netflix+canada PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474980/normal_5fc85ece14590.pdfIn PDF document text
    • http://complect-tech.ru/table_topics_for_toastmasters_examplesola2i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483365/normal_5fcef960f35b3.pdfIn PDF document text
    • https://nanijufofif.weebly.com/uploads/1/3/3/9/133999758/5253047a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_602cefb0d3294.pdfIn PDF document text
    • http://save50it.pro/angel_alliance_caregivers_llc_galloway_njlmykk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5fd044208d4cb.pdfIn PDF document text
    • http://sojarenenu.iblogger.org/sound_pollution_information_in_english.pdfIn PDF document text
    • http://stepka2016.xyz/tabigejinau6v4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365552/normal_5ff52b717e337.pdfIn PDF document text
    • http://vawuzusodiguse.iblogger.org/jokenatel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382770/normal_6030a77626e88.pdfIn PDF document text
    • http://topmassage.net/gijefawaxomorawuxu8q7r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469135/normal_603bc7acbeab1.pdfIn PDF document text
    • https://pavovebowejimop.weebly.com/uploads/1/3/1/6/131607108/4074803.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d3a002f-e0bd-479a-a46b-4d4da96667d1/what_does_it_mean_there_is_nothing_to_fear_but_fear_itself.pdfIn PDF document text
    • http://luzabozevagumak.epizy.com/32946815903.pdfIn PDF document text
    • http://jajowisomipuw.epizy.com/37116218478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d8676cd-e92b-47d2-8ab7-ef1f3b3f8ec6/john_maxwell_5_levels_of_leadership_full_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/012b36d9-cb7a-4564-beef-d208dc5e5b7a/gebavibajuna.pdfIn PDF document text
    • http://rujidita.rf.gd/video_banjarmasin_viral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/241521ba-6e3b-4ec3-8a4c-1176dadab030/8588714446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94966b00-fe24-45da-9a92-50fa6c78b5d2/how_to_adjust_kangertech_evod.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_off0000f67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67E 5120 bytes
SHA-256: affb28a72bd984b5759b57148481fa0dc26ef053cbe1cdcd63238533f2e3a926
font_01_sfnt_off000107f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F4 12012 bytes
SHA-256: 0dae161d3475121d5f91ed6c96a68ce432d582a30d86efa91dd6d88785837ab3

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