Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82f49148383b949…

MALICIOUS

PDF

78.9 KB Created: 2021-02-26 21:27:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a01a7cf0f2294d4146f2614351f44501 SHA-1: 24694d06ec7e1a8f1b756f8dfb3caec6153496b9 SHA-256: f82f49148383b949afff623fe6907103872ac19b913ad205054d0fdaac93b6f7
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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://seumenha.ru/123?utm_term=kriya+yoga+techniques+by+lahiri+mahasaya+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499283/normal_600744a12c0bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368752/normal_60013b7cc4661.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/how_to_administer_the_ssi-4.pdfIn PDF document text
    • https://zopixidasopotid.weebly.com/uploads/1/3/1/3/131397955/lifukin.pdfIn PDF document text
    • https://binapesod.weebly.com/uploads/1/3/1/4/131438069/zawixivevudeb-bafexa-xisix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476416/normal_60394a3a5a31d.pdfIn PDF document text
    • https://lipuxavevafip.weebly.com/uploads/1/3/1/3/131398459/kazuxogasexodapa.pdfIn PDF document text
    • http://ig-about.net/seran_pandian_tamil_movie_songs_freepu6m5.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/brother_hl2170w_setup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474722/normal_5ffd489bc0636.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426944/normal_5ff5df5ed25da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_602ed84fa2df1.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://jabodegodonirad.atwebpages.com/13046712946.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/tamil_hd_movies_free_website.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/94357505509.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/how_to_know_which_drill_bit_is_for_metal.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_off0000e87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87F 5908 bytes
SHA-256: ee383d0dbfd38415ae89e22ccd301e7dffb7e9d3101de84ab3ae4508c4837a9f
font_01_sfnt_off0000fc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC75 11232 bytes
SHA-256: 0ebc9cbfd41df73e04ad42d0e321a8c7271cd7ced22ae676eef686b67e46ee05
font_02_sfnt_off00012258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12258 2848 bytes
SHA-256: 512bd40176f4aefcdf09962f943d6d4f3e974318938a10fbc79a2ec74268b5a1

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