Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7f8b3d1655330b…

MALICIOUS

PDF

67.4 KB Created: 2021-03-22 13:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 74b3947d25f6fcf2e75bbdca5a41f504 SHA-1: 039ea5b2786eac07750db351649d2ccca2bca88a SHA-256: 2e7f8b3d1655330bf8f74bf0b808f2b6cd1b14bcc2f1880f7f8233b96261abfc
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, with one prominent URL being https://botokaw.ru/strik. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'Dunkin donuts caramel latte nutrition' and the wkhtmltopdf tool, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=dunkin+donuts+caramel+latte+nutrition PDF link annotation
    • https://lopuvekire.weebly.com/uploads/1/3/0/8/130813144/jakuvogimumalazuso.pdfIn PDF document text
    • https://walanugenaxoduf.weebly.com/uploads/1/3/5/9/135964425/21b563933aa43e.pdfIn PDF document text
    • http://femusawar.iblogger.org/komplikasi_endometriosis.pdfIn PDF document text
    • https://megefutuw.weebly.com/uploads/1/3/0/9/130969536/6958116.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/bitumen_test.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/caducidad_definicion.pdfIn PDF document text
    • http://pifanaliriwabo.mygamesonline.org/couper_un_en_plusieurs_foxit.pdfIn PDF document text
    • https://lemefinafotujux.weebly.com/uploads/1/3/4/6/134606632/8877746.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/best_homemade_ice_cream_maker_2020.pdfIn PDF document text
    • http://wofijolusiga.iblogger.org/compare_and_contrast_mitosis_and_meiosis_worksheet.pdfIn PDF document text
    • https://fakegegi.weebly.com/uploads/1/3/5/3/135312823/madog-ruvopisevagukox-pagipema.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/xogenima_jakuturigitimup.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/dazifozixawus/41604963882.pdfIn PDF document text
    • http://dedumiwikos.epizy.com/wazelujixufubimumedasaza.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/king_platform_bed_with_headboard_canada.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/urine_culture_report_in_pregnancy.pdfIn PDF document text
    • http://jelomasulavi.atwebpages.com/why_is_my_garbage_disposal_leaking_under_the_sink.pdfIn PDF document text
    • http://nununad.myartsonline.com/briggs_and_stratton_550ex_carburetor_parts_diagram.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_off0000ce43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE43 5148 bytes
SHA-256: 40d9d4745da095a23ab11f2aa827e3ab0d1f0b4253abf2963c2321789514b3e2
font_01_sfnt_off0000dfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB5 9420 bytes
SHA-256: d5b0008fb7016cf06a94b512c12083f762b2902687fb04d67d9767062d6fd1e6

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