Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b9e817d6ece3a2…

MALICIOUS

PDF

76.3 KB Created: 2021-03-14 14:06:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 271742423583cf230c207ae01c2baa10 SHA-1: c529dd451f12ed4a02d929ff981c838ab52ca02d SHA-256: 79b9e817d6ece3a2a33187bc6fd60900d52b4ad7b90312cc000793e7f276bf9d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body contains a deceptive lure related to dreams about pregnancy, and numerous embedded URLs point to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The presence of external URIs and link farm heuristics strongly suggests the document's primary purpose is to redirect users to malicious sites.

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://lozipotod.ru/strik?utm_term=what+happens+if+u+dream+about+being+pregnant PDF link annotation
    • https://merezedul.weebly.com/uploads/1/3/0/7/130739463/verofonexux.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/blacks_law_dictionary_deluxe_10th_edition.pdfIn PDF document text
    • https://lumigoxodavi.weebly.com/uploads/1/3/1/6/131606620/xovugigobi.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/laler.pdfIn PDF document text
    • https://xumotisububilup.weebly.com/uploads/1/3/4/5/134591263/gufuviripum_rubifu_kediponajifowa.pdfIn PDF document text
    • http://watogoda.mypressonline.com/64693872256.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/the_lost_ways_book.pdfIn PDF document text
    • https://fanuterose.weebly.com/uploads/1/3/3/9/133999321/vugokebuwuj.pdfIn PDF document text
    • https://nigerizebamogut.weebly.com/uploads/1/3/4/5/134596745/wolafumemado.pdfIn PDF document text
    • https://padilokemim.weebly.com/uploads/1/3/1/3/131381900/9410898.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulozor/baby_nest_pattern.pdfIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_bacf3ab917c54f06ac2eba6bbf7ce78a.pdf?index=trueIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_9385ef2a0e5b45e6bd73c7025fa85656.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/current_affairs_august_2018_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5529023-3232-4d78-bd21-e4fee3bc7cfd/72002380620.pdfIn PDF document text
    • http://zesugipove.onlinewebshop.net/grade_12_biology_textbook_download.pdfIn PDF document text
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_7971dab6dfe247dc9f12ac6daea6dd73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aff04fb6-af53-45d3-bca4-cdf4d46d622e/wumimetimujitelibijenuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5c4d5f-ef92-42a1-b0df-bd80122abe00/basic_object_oriented_programming_concepts_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6820f8e5-ca12-4bfd-8363-4da90b4321d3/jesus_amigo_letra_y_musica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a1695d-eb06-4c2c-97bf-0bae0d64c561/26650181634.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_off0000ee48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE48 5576 bytes
SHA-256: 09e0538a128a9a17969b9b1ed8bcb66c171db2e3352aa545c86aa97128741489
font_01_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 10136 bytes
SHA-256: 23223d2ed65081d55a4d19b7e3f51e08c4aa87c2680bdbecc1a6f21aa218ca6c

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