Malicious PDF — malware analysis report

Static analysis result for SHA-256 833217b9966aceb1…

MALICIOUS

PDF

85.4 KB Created: 2021-02-20 20:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8f46a245958bb02480b9b5eb85c5c980 SHA-1: c0a6d57bda2b7ed55274ec5de1aca81296bb589b SHA-256: 833217b9966aceb1405bece3215cc03c8dcab9d6ebf9fd19cd31cf5497e8a35f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and Weebly hosting, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://seumenha.ru/123?utm_term=ti-84+plus+calculator+online+free PDF link annotation
    • https://pazerutafu.weebly.com/uploads/1/3/5/3/135392620/41a77e2c62f4.pdfIn PDF document text
    • http://sewaseg.22web.org/88949855383.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/jadisazenaxipon-vozagigipegos.pdfIn PDF document text
    • https://golisarupu.weebly.com/uploads/1/3/5/3/135317681/8351580.pdfIn PDF document text
    • https://zawobulogu.weebly.com/uploads/1/3/1/0/131070044/1591215.pdfIn PDF document text
    • http://fetisaletom.iblogger.org/google_sheets_app_sort_range.pdfIn PDF document text
    • http://manthoughtswebsite.website/47943270698l3e3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377697/normal_5ff48bdfad88b.pdfIn PDF document text
    • http://interbank.link/cabala_para_principiantes_gratishdsvl.pdfIn PDF document text
    • http://nizumewuminal.iblogger.org/31034507914.pdfIn PDF document text
    • http://dowator.22web.org/73749906193.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nogojituwizax.epizy.com/view_jacoco_report_in_jenkins.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/tuxekodojuxemu.pdfIn PDF document text
    • http://relimimukavewuj.rf.gd/jungian_archetypes_book.pdfIn PDF document text
    • http://larisakexifa.epizy.com/video_er_iphone_2019.pdfIn PDF document text
    • http://puvumepuf.epizy.com/bol_radha_bol_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/avatar_film_video.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/gititefadigasuzitodumewal.pdfIn PDF document text
    • http://saritimiramig.rf.gd/mastering_manga_3_power_up_with_mark_crilley_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/gubefazemumuxufusat.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D6 5152 bytes
SHA-256: f3d24a28f30a4cf53dad186b83ad7c13808336555a69f418907c6e8429aa12b7
font_01_sfnt_off00011470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11470 10936 bytes
SHA-256: 1afc628a2dd06a95cc06250173b66fe7d59e0bfb9c2a13314005d93e425819d1
font_02_sfnt_off000139b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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