Malicious PDF — malware analysis report

Static analysis result for SHA-256 2905a568ddcae335…

MALICIOUS

PDF

77.6 KB Created: 2021-02-12 10:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 46fb41bec9c7ff2d75cc74b3771b5e3f SHA-1: d83b755fa293688c3bf687e3db8b3a9c2ed32b89 SHA-256: 2905a568ddcae33512d9d7301e486095295429dc3e75844525ad2379f4272204
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=types+of+editorial+design PDF link annotation
    • http://taxokisekajetek.22web.org/javufigazifoxeda.pdfIn PDF document text
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/tuxetuzumezire-puzumozaxadubu-xemiraziz.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/8563f7e.pdfIn PDF document text
    • https://nibuzexo.weebly.com/uploads/1/3/4/7/134720699/xurefululik.pdfIn PDF document text
    • https://resewirebibabap.weebly.com/uploads/1/3/1/3/131379054/vegoje-palazofupegeza-pugavamofinubum-fameselos.pdfIn PDF document text
    • https://rozozejowetape.weebly.com/uploads/1/3/4/5/134510424/dexujidiwupira.pdfIn PDF document text
    • http://ruwegekugite.22web.org/axial_spondyloarthritis_guidelines.pdfIn PDF document text
    • https://wigowuwadapol.weebly.com/uploads/1/3/5/3/135315864/tiregil.pdfIn PDF document text
    • http://zedukibawubige.22web.org/abbyy_lingvo_x6_free.pdfIn PDF document text
    • https://xozijelotegog.weebly.com/uploads/1/3/5/3/135327018/xifomegupe_katagifofukajop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zovewopot.epizy.com/applied_data_science_with_python.pdfIn PDF document text
    • http://janofegiwene.epizy.com/56359516068.pdfIn PDF document text
    • http://bipedok.epizy.com/black_desert_mobile_apk_taptap.pdfIn PDF document text
    • http://xamazaxalezamat.rf.gd/ruwomivemajofemakibuza.pdfIn PDF document text
    • http://dipulitexaxuz.epizy.com/armonicos_en_la_red_electrica.pdfIn PDF document text
    • http://vedegisawopuf.epizy.com/balthasar_gelt_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/dototufojatesabadada.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/10056301937.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/intellij_checkstyle_format.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_off0000e809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE809 5260 bytes
SHA-256: 17a9c2abb00b0c09cc8472dc62140eb66fc49392acf1709d69bfdfa0e4490bae
font_01_sfnt_off0000fa04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA04 15228 bytes
SHA-256: 6b818ac61a0b0420a8f4128adb26c9b562f6eec748034d1fa993c05d59d9ac05

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