Malicious PDF — malware analysis report

Static analysis result for SHA-256 802f04bd711c0757…

MALICIOUS

PDF

74.8 KB Created: 2021-05-16 10:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 46b2389ac4c851a020b8dd455ebc2574 SHA-1: 557d318eb47172fd54e016fe6e1925b53dba4a70 SHA-256: 802f04bd711c0757df386c97c429669a2dca572f0ec9c2e4896453d58f1e3acd
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://maypoin.ru/strik?utm_term=richard+dotts+books+in+order PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384144/normal_5ff75faba0898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_6021cd026a3fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426823/normal_606e87b808351.pdfIn PDF document text
    • https://lunafegosewexik.weebly.com/uploads/1/3/5/3/135351611/jojiwam_jokesamukilug.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/79422354326.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375199/normal_5fca8e27378db.pdfIn PDF document text
    • http://riragukigud.scienceontheweb.net/what_is_the_purpose_of_a_memorandum_of_law.pdfIn PDF document text
    • https://miwimuwal.weebly.com/uploads/1/3/0/7/130775744/sapigenedu.pdfIn PDF document text
    • https://cdn.sqhk.co/donewipimep/gihhhjJ/70558327788.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/g6jiief/pilulovepuzojemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_6068a044426da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_6003ce011aac7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464877/normal_60207cd700590.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lolunoxij.myartsonline.com/automobile_technology_textbook.pdfIn PDF document text
    • http://kagapoxarizi.rf.gd/88601638953.pdfIn PDF document text
    • http://dufofukitali.rf.gd/conversion_factor_sheet.pdfIn PDF document text
    • http://fofebur.rf.gd/august_2019_calendar_template_free.pdfIn PDF document text
    • http://bidetorula.rf.gd/6889659062.pdfIn PDF document text
    • http://wisunomimat.epizy.com/harry_potter_yla_camara_secreta_google_drive.pdfIn PDF document text
    • http://luxupuxud.myartsonline.com/subtraction_with_borrowing_worksheets.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_off0000e7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C1 5208 bytes
SHA-256: ef39e42705619d1864fdbf2023abae17ef9a088f94fe7c17d68340b98d50a330
font_01_sfnt_off0000f971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 10684 bytes
SHA-256: 77f26068d592c502e7b10e1076ad7702ae30606123e05373c61b707c99226427

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