Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af49b9abc4511d6…

MALICIOUS

PDF

68.6 KB Created: 2021-03-20 08:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e40257b64a4bae1f4a6bfe707a7d04cc SHA-1: 558ea1a60577dfc8ff3a91472393087128100a74 SHA-256: 2af49b9abc4511d6374189245564b12730ebd2f1f26fa3f5bed8a334960d595a
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 0.9997

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://seumenha.ru/123?utm_term=office+for+mac PDF link annotation
    • http://justamorem.com/12236496559wm3av.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/fidunovavafagazusubizaj.pdfIn PDF document text
    • http://bepifukikuku.mygamesonline.org/84706971948.pdfIn PDF document text
    • http://geleostone.online/wesajiwosuvekopolcxj50.pdfIn PDF document text
    • https://gusujosu.weebly.com/uploads/1/3/0/7/130775940/mimowelonebogono.pdfIn PDF document text
    • http://gigezojiradof.scienceontheweb.net/887025848.pdfIn PDF document text
    • http://temilops.xyz/census_of_marine_life2aw12.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/management_information_systems_jobs_entry_level.pdfIn PDF document text
    • http://jumbochecker.com/2010_chevy_malibu_power_steering_problemsgm12f.pdfIn PDF document text
    • http://bluebadge-support.com/18685112502kexa4.pdfIn PDF document text
    • https://kenazago.weebly.com/uploads/1/3/1/0/131070597/xegimufixiz.pdfIn PDF document text
    • http://palubofapejuraw.mywebcommunity.org/nurobidubibejem.pdfIn PDF document text
    • http://nigodofifulo.scienceontheweb.net/teperowowirulepizik.pdfIn PDF document text
    • https://nusoselif.weebly.com/uploads/1/3/4/4/134470887/gagefamozomevu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vejegaba.atwebpages.com/35615290137.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/national_oilwell_varco_mechanical_engineer_salary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5592d03-49c7-4362-83f6-4aa28cf05c81/the_battle_of_the_labyrinth_books_cool.pdfIn PDF document text
    • http://zoligagomuwe.onlinewebshop.net/97605996897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3a9521-ac4c-4458-91c0-ddfb6da96f13/chefs_choice_knife_sharpener_1_2_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4531da3f-54ca-44b2-88be-c2013f6e4211/how_to_send_certified_check_online.pdfIn PDF document text
    • http://lufopudizomuv.atwebpages.com/gibabakubikusujar.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_off0000d08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08A 4844 bytes
SHA-256: 98499eef919590ff94efeaea04e99bb94e899e9581d662a4f321afd58ddfeb13
font_01_sfnt_off0000e0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EF 10680 bytes
SHA-256: dc681815ebee2aacdd562dd037b59fe3be7bf505ec99cf836aacfa58498a5f2a

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