Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9228d2c0ef232d…

MALICIOUS

PDF

126.0 KB Created: 2021-06-08 20:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 86c4e76ba2f0b1687127a839b1d58cff SHA-1: 5285ee6216f03312a0dd998f2270b8d0c5a8181a SHA-256: 3e9228d2c0ef232d77f3b7f3920736a1ae15ab1b38f155c6099c5ae56483c6ec
134 Risk Score

Malware Insights

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

The PDF contains multiple external URLs and a heuristic firing for a 'download button' lure, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious workflow, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/pbw?utm_term=ramaleela+malayalam+movie+torrent PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474462/normal_5fcf09b7ea673.pdfIn PDF document text
    • https://birinubawode.weebly.com/uploads/1/3/6/0/136026057/pefezepeteximewuza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451365/normal_5ff5f99d34cb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_6049b6f90067f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460042/normal_5fcd7d6df1665.pdfIn PDF document text
    • https://nepujegoxamo.weebly.com/uploads/1/3/4/3/134380276/56753.pdfIn PDF document text
    • https://lavofimezifo.weebly.com/uploads/1/3/4/3/134341346/suximagutuv.pdfIn PDF document text
    • https://pebizadovabunal.weebly.com/uploads/1/3/4/7/134711288/4557602ec.pdfIn PDF document text
    • https://riligasiguvenu.weebly.com/uploads/1/3/5/3/135392009/ruwavutusadiwen-zotufawe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452839/normal_5ff568909688e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404757/normal_60395a1eb8215.pdfIn PDF document text
    • https://pinawarewexelaz.weebly.com/uploads/1/3/4/0/134012939/9969999.pdfIn PDF document text
    • https://jiwepeduvebata.weebly.com/uploads/1/3/1/4/131456267/2077966.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424982/normal_6007f891cc0a3.pdfIn PDF document text
    • https://junobinedutuki.weebly.com/uploads/1/3/2/7/132712306/3817858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_60282690d0057.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najapenoz.pbworks.com/w/file/fetch/144544224/how_to_draw_cartoon_eyes_on_procreate.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/xijenoj.pdfIn PDF document text
    • http://wuvebag.pbworks.com/w/file/fetch/144425112/quantifying_energy_flow_in_an_ecosystem_worksheet_answers.pdfIn PDF document text
    • http://kedajawi.pbworks.com/w/file/fetch/144787476/how_to_put_uppababy_vista_in_travel_bag.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/govinda_namalu_lyrics_in_telugu_mp3_free_download.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000185ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185CA 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off0001967e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1967E 5376 bytes
SHA-256: c00ccd21bcdbc649411c9a44a566da483bf0d3366c95c548a4d0c4725fea411b
font_02_sfnt_off0001a90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A90B 4824 bytes
SHA-256: bf2640332e7fa7484459826c6595dd233f9f4b28e51d34567b33f414e4156b7f
font_03_sfnt_off0001b969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B969 15524 bytes
SHA-256: b5216ce618faa9ef657bcc0a62e1d70c1719dc5631d780c506c28494824342ad