Malicious PDF — malware analysis report

Static analysis result for SHA-256 013b280ce7ad2fcb…

MALICIOUS

PDF

78.4 KB Created: 2021-06-12 03:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9b2aa63e7b7d4ecfa688ee76f6e27c5f SHA-1: e3e76ea477f277b2b5bc8a08617e8a4b158ee8cd SHA-256: 013b280ce7ad2fcb905c75e10bf9abcf54429d6780275ebb344433455dcc688d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://huntic.ru/pbw?utm_term=west+bay+hotel+ielts+listening PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450147/normal_5fe97eabef6fd.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4483587/normal_60aff2ff75c52.pdfIn PDF document text
    • https://fokifukamanur.weebly.com/uploads/1/3/0/8/130874497/dejerubop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475570/normal_5fcf7f75b61b4.pdfIn PDF document text
    • https://sixopumep.weebly.com/uploads/1/3/4/2/134266524/jufifatup-mimiwexe-warupipigamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3f980ce4-d5a4-4178-a21d-f83ee3e077a0/26591589524.pdfIn PDF document text
    • http://pujexusineg.pbworks.com/f/dejuxot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702ecc03-21e2-4ecb-9cbc-d1385e9138ba/lonuwonofapuzogeze.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144574632/society_of_righteous_and_harmonious_fists_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485e90c3-0e01-4a33-aae9-7ea10069dfed/1994_ford_ranger_repair_manual_free_download.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/w/file/fetch/144728157/how_to_create_a_profit_and_loss_statement_in_quickbooks_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a867fa96-b99a-483c-97f4-4e51b95ee5e1/what_is_automatic_light_control_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/770d933b-91e3-421d-a0a9-3f62fde8dae9/what_age_is_the_fault_in_our_stars_book_for.pdfIn PDF document text
    • http://rizukokodi.pbworks.com/f/nazazovapoweve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d87aefe8-cf21-40d2-a57a-954834df717a/tefasizojovitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1d1585-e11a-4d48-995c-d1e69f9a0184/63778301461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2756333-907a-482f-b5c0-811e48bdb16d/9_3_practice_rotations_answers_page_22.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AF 4892 bytes
SHA-256: ce9c34ef9a15dc6f06f0b657be3c9ac8b9d576a69fad26172a22ab33fe6f9c34
font_01_sfnt_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 15180 bytes
SHA-256: c8b3cb6a677c5f46a32a9bc4880305a2a8300a783b208eda791c286617f54545
font_02_sfnt_off00011cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAC 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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