Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae3113bb179855a…

MALICIOUS

PDF

83.7 KB Created: 2021-03-21 03:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2c9b5e018004c7d4529c14009afca2e0 SHA-1: 94880dff585ee503420cf7cd95c1545eddc385bd SHA-256: dae3113bb179855a7c32e766d30eeb8f238b81e4b6940e1d9d37554e742c49c9
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to potentially malicious domains, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to external sites.

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://dugedepap.ru/award?keyword=calendario+octubre+2020+mexico+pdf PDF link annotation
    • https://kusafowagu.weebly.com/uploads/1/3/1/8/131871480/pepesuted.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/iwiaDja/vovezabepakazabiweterav.pdfIn PDF document text
    • http://fito4ka.xyz/aretha_franklin_nessun_dorma_mp3_free_downloadqvu4w.pdfIn PDF document text
    • http://sy0n.icu/fusekewenifalagodedd67kd.pdfIn PDF document text
    • https://xozuwowofar.weebly.com/uploads/1/3/1/0/131069921/dedixos.pdfIn PDF document text
    • http://fexuvukenix.22web.org/53831228852.pdfIn PDF document text
    • https://cdn.sqhk.co/xevezele/nJlHjif/big_momma_like_father_like_son_quotes.pdfIn PDF document text
    • https://bogonifad.weebly.com/uploads/1/3/4/1/134108647/2f7f78e.pdfIn PDF document text
    • http://buylettersonline.com/todarepesuvabun0pmbl.pdfIn PDF document text
    • http://vinnipoh.space/pudefawujaxgjana.pdfIn PDF document text
    • http://itrom.fun/gedasujumofubupadas3usy.pdfIn PDF document text
    • https://kulabukotijol.weebly.com/uploads/1/3/4/7/134703535/2655629.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/iiZ6gfm/cyber_hunter_apk_download_uptodown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://motirovaribepok.rf.gd/539782617.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/lowirazel.pdfIn PDF document text
    • http://zegegapo.rf.gd/xelaludodu.pdfIn PDF document text
    • http://tuxefofoxomar.epizy.com/at_what_age_can_you_get_ssi.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/66928836910.pdfIn PDF document text
    • http://debagejusuwaj.epizy.com/ejemplos_de_citas_textuales_formato_apa.pdfIn PDF document text
    • http://xebojipex.epizy.com/webuwolivotumibob.pdfIn PDF document text
    • http://xurebebin.epizy.com/bendito_seas_seor_palazon.pdfIn PDF document text
    • http://lobosutu.epizy.com/dogago.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_off0001060b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060B 5508 bytes
SHA-256: ebcb23f777fee216a20324d99f5860856f6819b6236cec95191716245c43576d
font_01_sfnt_off000118ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AC 12616 bytes
SHA-256: 29fb7ba22b0d5fc1e85fc07cc01ad4d9ec227eb3a743ae003f5098b9c03de477

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