Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2668bd681ce626…

MALICIOUS

PDF

114.0 KB Created: 2021-03-03 14:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5f4b5bd4709df943783a6c5ec3903b47 SHA-1: ecc16f1bb457b85554d31d8f10ea5c998b72db90 SHA-256: 2c2668bd681ce626bfd4ef16e5aae1dfaeb7ce9deca7474e3ba458d2e6ef0309
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one specifically pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support this attack pattern.

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://botokaw.ru/award?keyword=how+many+questions+does+the+mmpi-2-rf+have PDF link annotation
    • https://cdn.sqhk.co/xedaberetaj/jfghshh/riders_on_the_storm_snoop_dogg_instrumental.pdfIn PDF document text
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/sojokuduxemim_digexumuw_gejebigifipuw.pdfIn PDF document text
    • http://supportcopyright.net/36624569402qzdy9.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/what_is_the_process_of_rock_formation.pdfIn PDF document text
    • https://nuxabofubuwaxef.weebly.com/uploads/1/3/2/7/132740905/3d82263.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/AWYhdhT/virtual_villagers_origins_2_power_crafting_hut.pdfIn PDF document text
    • https://putofikanavo.weebly.com/uploads/1/3/0/7/130738484/4273963.pdfIn PDF document text
    • https://vifutezovabul.weebly.com/uploads/1/3/1/4/131408528/vetoxasoditi_tegumisopofidid.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/jdhfejk/gotasabun.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/d52hwuM/wixalofepuvigivunevijup.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/yjiQpij/tomejej.pdfIn PDF document text
    • http://atomyimperial.ru/gipofubikifevadorarawaxiv5wkw.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/35485505056.pdfIn PDF document text
    • http://online-bestshop.xyz/94173790755duvbv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowelipap.epizy.com/vuxedekusomewujefapug.pdfIn PDF document text
    • http://maxovizanopi.rf.gd/the_girl_you_left_behind_lyrics_an_american_tail.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/4th_grade_grammar_curriculum_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/what_is_the_movie_50_shades_darker_about.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/boy_scout_popcorn_sales_sheet_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/spotify_alternative_free.pdfIn PDF document text
    • http://josuguremim.epizy.com/radio_button_like_checkbox_android.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/thinkpad_t430_price_philippines.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_off00018280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18280 5756 bytes
SHA-256: 6aa4e88c14f6f19cc3dfd8a03fe29cde489bf1645189130f40d1a359ba8fb01a
font_01_sfnt_off00019611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19611 10616 bytes
SHA-256: f155a27c92c311f34f22a6676e34f1a762d88312e23d1402763a892d6762247b

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