Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbc20578cb45a0d…

MALICIOUS

PDF

117.1 KB Created: 2021-03-27 22:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3aa00407480d6db1558ce479b22afc64 SHA-1: 648640742c21a7a52d0143ea4adfd613be092652 SHA-256: afbc20578cb45a0d03d3a3dd500efcd856d3e99e2d42c7b819c2c0b2cd2e588b
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The primary URL, 'https://gimoguvi.ru/award?keyword=cinderella+original+grimm+pdf', suggests a lure to trick users into visiting malicious sites. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gimoguvi.ru/award?keyword=cinderella+original+grimm+pdf PDF link annotation
    • http://tiwimifozukimu.medianewsonline.com/zozaraberazokiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_6013735e5562f.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/himno_al_maestro_el_salvador.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/bose_cinemate_gs_series_ii_troubleshooting.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_60305a3506c62.pdfIn PDF document text
    • http://weridif.medianewsonline.com/diagrama_de_fases_acero_carbono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495849/normal_603a9462beb07.pdfIn PDF document text
    • https://zadukali.weebly.com/uploads/1/3/5/3/135340438/zufovo_kogimapuzogip_loxotunip.pdfIn PDF document text
    • https://cdn.sqhk.co/lokabawopup/RFOghaH/mipin.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/ghehgif/abbaigaru_telugu_video_songs.pdfIn PDF document text
    • https://kekugijofer.weebly.com/uploads/1/3/5/3/135321092/panek.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/metakibeme/75753240982.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/53636412780.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/how_to_clean_my_jacuzzi_tub.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/30027678119.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/player_unknown_battlegrounds_mobile_pc_version.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/bogoroditse_devo_rachmaninoff.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/login_form_templates_using_bootstrap.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/nixunuberedawexole.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_off00018a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A81 5088 bytes
SHA-256: e6051546860697891fa88b20eab84573d879e3e15de322a4f08d7dee6ada1e9c
font_01_sfnt_off00019bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BB5 14660 bytes
SHA-256: ef40ec376e5e9ec481a937950c94377685837ed8694f2c4908761c9c4d1af5a5

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