Malicious PDF — malware analysis report

Static analysis result for SHA-256 7689ab202fdb115d…

MALICIOUS

PDF

85.6 KB Created: 2021-03-31 03:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8cb6413fe3f9c645a169f6e9cba54322 SHA-1: a964bb8e3664027069469d443d7021610a3e545f SHA-256: 7689ab202fdb115d9e8ca304d69404cc596b169b57456a10304baa1b85fbf812
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 0.9964

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://leonvi.ru/wix?keyword=casio+hr-8tm+user+manual PDF link annotation
    • http://sqrab.top/practice_worksheets_for_past_perfect_tense1110i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464852/normal_600b59e8778a2.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/wapelafikuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486356/normal_601198daa3636.pdfIn PDF document text
    • http://ita-bio.fun/40990279200u2jw6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470985/normal_5fe4d94a884d3.pdfIn PDF document text
    • http://guitar.su/furomoruliwowukerg4qk3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412900/normal_6054480740c40.pdfIn PDF document text
    • https://gosalojuwik.weebly.com/uploads/1/3/6/0/136050429/9252376.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405687/normal_5fffe20d9e2f5.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/9128061.pdfIn PDF document text
    • https://timowerudep.weebly.com/uploads/1/3/0/7/130738780/niwemid.pdfIn PDF document text
    • http://wow50.pro/batang_pasaway_lyricslgc31.pdfIn PDF document text
    • https://wijuluvewez.weebly.com/uploads/1/3/1/4/131437378/xuraxulikin-rubopa-vafisiluj.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/what_is_active_listening_in_psychology38q5y.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/c59f8770-ef93-4f71-b243-8bbc43211c5f/juwobujibexerarire.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/zasut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc58177-625d-422c-9fd5-aa8972582829/74581361785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956d16ab-f909-4cb6-aa7a-7db629605a8f/68550991844.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/23846256425.pdfIn PDF document text
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_2cc337dd179746828af6148144e93fe8.pdf?index=trueIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_50efc71b3b974ad1ae2f898f72dfec94.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/47772880772.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/pokemon_sun_and_moon_switch_port.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1ad379-7393-4f4c-abde-7e7b41dcd83f/21_day_challenge_meal_prep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415b46d8-aabb-4d9f-9242-f5aec0975d2b/52068199949.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/lookup_zip_codes_by_address.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_off000111e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E4 5056 bytes
SHA-256: a70427a01c117f35315206c12db929609157729747e983309704fef95c79e690
font_01_sfnt_off000122e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E2 11196 bytes
SHA-256: ac0341bf5f5a267fa28adb9d6df2cd1edf0a960bd40bf3f5396cda5e0c1eb3ca

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