Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0d7bf5703504e9…

MALICIOUS

PDF

73.2 KB Created: 2021-06-06 13:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e0085850f0da038095f144a486b33304 SHA-1: cfd4cc9beb111a0a4db1a4d47ba63774fc9c0973 SHA-256: 9e0d7bf5703504e9950c10831273274d204c10b661947a881bcce140673c6565
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://drafthe.ru/pbw?utm_term=replacement+licence+nsw+form PDF link annotation
    • https://divigutokorafo.weebly.com/uploads/1/3/4/6/134683056/kagunaxupeka_giwowuta_fojixo_kalofaduri.pdfIn PDF document text
    • https://metubunotawe.weebly.com/uploads/1/3/4/5/134595280/4028609.pdfIn PDF document text
    • https://gilulunerokife.weebly.com/uploads/1/3/5/2/135296548/d90b652052dc2f.pdfIn PDF document text
    • https://roxomikanu.weebly.com/uploads/1/3/0/8/130873860/vodagaf-soxapebe-rokemup-dasibazobena.pdfIn PDF document text
    • https://govalusazun.weebly.com/uploads/1/3/5/3/135325024/00a935cd0c61cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453914/normal_5ffce22e1ee94.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/forinabejegap.pdfIn PDF document text
    • https://fiverepibimasi.weebly.com/uploads/1/3/4/8/134893498/tifate-zinal-selabuduk.pdfIn PDF document text
    • https://sunatoruxule.weebly.com/uploads/1/3/4/4/134476105/xibila.pdfIn PDF document text
    • https://puxomesepose.weebly.com/uploads/1/3/5/9/135977076/4766587.pdfIn PDF document text
    • https://gujuxufun.weebly.com/uploads/1/3/5/3/135398829/5285921.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457847/normal_5fe13aa2cd945.pdfIn PDF document text
    • https://tedamitaza.weebly.com/uploads/1/3/0/7/130740371/wiwujaruvoro_dewidivusas.pdfIn PDF document text
    • https://zobaretax.weebly.com/uploads/1/3/1/4/131482953/4dc9bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b378c041-04ca-45fc-9fc7-10fc38912a37/fl_studios_10_cracked_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a9f296-2be1-45db-accb-4ba3317c4cca/26198078601.pdfIn PDF document text
    • http://xixokuzujoz.pbworks.com/w/file/fetch/144640935/why_do_we_need_to_adjust.pdfIn PDF document text
    • http://vimaxojejo.pbworks.com/w/file/fetch/144702279/10_new_syllabus_social_guide_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/665e9a99-40c4-40b0-920d-436dcf05d849/32207704225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07598fe6-abe9-438d-a435-11362b0d7b66/fabuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a129d179-c61d-40a5-b5d3-fd51ae5f3936/subway_surfers_2_game_free_download_for_pc_windows_xp.pdfIn PDF document text
    • http://kigijujozi.pbworks.com/f/tunolubijobuzilizivoji.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/f/naginata_techniques.pdfIn PDF document text
    • http://gisugakeg.pbworks.com/f/dozuratiditivexut.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_off0000e381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE381 5260 bytes
SHA-256: bdb04c4373b05ac87e3d99de7fd67f00eeb9c827b33211d192c87cc2eeb601eb
font_01_sfnt_off0000f565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF565 9900 bytes
SHA-256: 9a1c87b6616aa1f5b036aefb633c5826504db95fa204fbcddd1b1218610ecda4