Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9036db1bc6648fb…

MALICIOUS

PDF

74.0 KB Created: 2021-06-11 12:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8adf4c0346c2153ecaa5a5ecfc404268 SHA-1: 982b017b2948cf09cca4b438dbd23a634acc6b43 SHA-256: d9036db1bc6648fb52be906fe04e3a8cecf7e9f3b0bee349dcc7260f9c09b326
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to link farms and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to movie titles and application names, which may be used as lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://huntic.ru/pbw?utm_term=kuch+kuch+hota+hai+full+movie+in+tamil PDF link annotation
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/kotazurimog.pdfIn PDF document text
    • https://buzokiki.weebly.com/uploads/1/3/4/8/134853803/ebf70fc42.pdfIn PDF document text
    • https://sekugarotapoze.weebly.com/uploads/1/3/4/3/134362520/1318320.pdfIn PDF document text
    • https://bipalokepug.weebly.com/uploads/1/3/4/4/134492575/4889049.pdfIn PDF document text
    • https://nazoxuja.weebly.com/uploads/1/3/2/8/132814973/konim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144810237/parallel_structure_exercise_3_worksheet_answers.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/f/mabafozaxuposumiberi.pdfIn PDF document text
    • http://papoxuva.pbworks.com/w/file/fetch/144724785/xegojimedo.pdfIn PDF document text
    • http://vasoxekisede.pbworks.com/f/29026048874.pdfIn PDF document text
    • http://xuwajesorewo.pbworks.com/w/file/fetch/144994002/fuveweludupuxudisa.pdfIn PDF document text
    • http://kolelulu.pbworks.com/f/605134733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e8b4357-007d-46b1-a9dd-915ec627f953/what_intermolecular_forces_are_shared_between_ch3f_and_cf4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b057a8-9742-4a36-b37d-39bae172ca96/xumumumolijisixeli.pdfIn PDF document text
    • http://lonazak.pbworks.com/f/plants_and_snails_gizmo_answers.pdfIn PDF document text
    • http://mokakiw.pbworks.com/f/cae_sample_test.pdfIn PDF document text
    • http://tekitejug.pbworks.com/w/file/fetch/145114641/download_slugterra_dark_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bceeff1-3631-4f94-909d-d83cf7f89f5d/charlie_and_the_chocolate_factory_book_cover_image.pdfIn PDF document text
    • http://beratirupo.pbworks.com/f/sda_church_manual_2020_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/054c4f6d-8476-4ba4-b1b6-ce0890999adc/61960282073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3f3c92-3ba8-4508-b789-6745d93ad2e8/34216869509.pdfIn PDF document text
    • http://xuwuziz.pbworks.com/w/file/fetch/144513795/what_do_corpus_juris_secundum_meaning.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_off0000d859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD859 4940 bytes
SHA-256: 49bd771f2acbedf5bc80458b111217c6533f36b54af332f79d8e5ded54149018
font_01_sfnt_off0000e913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE913 2668 bytes
SHA-256: 9e93bf4364e47b48a20b5132a1b1e85fd08bc675698306dd9494ab7464bdc9ac
font_02_sfnt_off0000f43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43C 11396 bytes
SHA-256: e4bcc1c4917a7b04db1c8427420928293aa55c5ec7d6feded72c7f0e245457ed

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