Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ec12378810426e…

MALICIOUS

PDF

76.5 KB Created: 2021-03-10 21:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 332f5e75566b75d331878736371eedea SHA-1: dd96d1b83b75e8bb05981845097fe7222f510a80 SHA-256: d3ec12378810426e05f6ea694503eaf8523348fbb267a5ce26c49c1dfaa50b1a
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://botokaw.ru/123?utm_term=backup+android+rom+to+computer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402501/normal_5feb78842aeca.pdfIn PDF document text
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/2710254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467277/normal_60252fdf8e6fa.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/tesajominozakaxokuro.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/igUjcAr/24854037433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475863/normal_603edf11a022c.pdfIn PDF document text
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/nimavezinoxub_wokafido_tejodivozulukeb.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/5hcjhcz/96207460818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_6028395fac650.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/wjadqja/dunia_games_redeem_ff.pdfIn PDF document text
    • https://fafamamijusoma.weebly.com/uploads/1/3/4/3/134371196/jesanuxukit-nudigodafamuza-peragapapero-gamavoxexesom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375073/normal_5ffdb4d4379c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420588/normal_5ff45191eda16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_6033297deaf16.pdfIn PDF document text
    • https://xuwobonamufaguw.weebly.com/uploads/1/3/5/3/135315698/miwiru-padezopezabi-jajenijidof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380078/normal_5fcb11b52f25c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_5fe6bb08136f9.pdfIn PDF document text
    • https://cdn.sqhk.co/sejaganetaxa/fnOjfhh/70123340784.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/2Tbib6l/batman_the_enemy_within_switch_physical_release.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459320/normal_60001602c2235.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sipanokule.onlinewebshop.net/69036346132.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/semapisok.pdfIn PDF document text
    • http://pidodexogejax.myartsonline.com/kujagusu.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/ben_10_games_free_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/babu_o_rambabu_song_lyrics.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/75245328226.pdfIn PDF document text
    • http://liwetagosozel.onlinewebshop.net/37253434935.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_off0000ecd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 5120 bytes
SHA-256: b575ca0da8b17744bf3cf4960745f9dccc1e913c71c5889c6074cdfbc86c541d
font_01_sfnt_off0000fe33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE33 10764 bytes
SHA-256: c512f57439d56cf90668a0957e8c1cc39ba4fea58051058543f805b5e206f3b5