Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe3a9715c4dfc1f…

MALICIOUS

PDF

75.4 KB Created: 2021-03-25 19:47:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 44c6cb323ce6af621c4f9fc886fc67b9 SHA-1: c5b1ed9a26faef906678974653836888bd69ffb1 SHA-256: fbe3a9715c4dfc1f86a554bd9594369693b5e124504a8951dd2024dfe20a8ec8
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 0.9993

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://dugedepap.ru/123?utm_term=ophelia+piano+sheet+music+easy PDF link annotation
    • http://veselutut.mywebcommunity.org/acer_aspire_3_replacement_charger.pdfIn PDF document text
    • https://vazaratel.weebly.com/uploads/1/3/4/0/134017227/7378052.pdfIn PDF document text
    • https://werudugin.weebly.com/uploads/1/3/0/8/130873895/walebawuxuf-nuvejixizile.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/gjfhghc/39877730965.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/bgdjhgh/77679598760.pdfIn PDF document text
    • https://kuvobawodamelis.weebly.com/uploads/1/3/5/3/135350379/9b1008.pdfIn PDF document text
    • http://palopej.sportsontheweb.net/zuwitoguxojalusenona.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/c_quick_reference_guide_template_word.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/UzgGOjg/kofasujuli.pdfIn PDF document text
    • http://liberum.sportsontheweb.net/bemerufitomuvewepelawaf.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/15240077283.pdfIn PDF document text
    • http://lukiduxipapep.mywebcommunity.org/fineluvenuwakagaji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/84611634685.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/puzenuxubupefagesomuw.pdfIn PDF document text
    • http://vogapodidojuguf.myartsonline.com/anemia_normocitica_normocromica_en_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/81405053537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49cbe3e9-3ed5-40e2-b207-655d82aa7380/intex_salt_system_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/zipafobod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0377ea85-b83b-44ab-8de0-f3cdb9b09ea8/fusinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec328eeb-3dc1-4584-a9c6-cea617ef9e3c/wikaremat.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/weather_report_chakri_rawalpindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db019bb-8a88-476c-b286-ed73d4ee0b80/how_to_code_using_grounded_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3076f205-d383-49ae-a39e-1205341b2fcc/old_lawn_boy_lawn_mower_for_sale.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_off0000e964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE964 5208 bytes
SHA-256: e92ad9c4ac4b33400df7a32f2ed9fc5b3a9bd7bdc83fc14c4a4ac88f233debfb
font_01_sfnt_off0000faf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF9 11148 bytes
SHA-256: 7e2638e6da0f7385a831e064ed37cd6c9f585e822a378d005b517b1ad4aa64a8

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