Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c210da169644508…

MALICIOUS

PDF

87.4 KB Created: 2021-03-17 06:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d95d0c13969624535524f54de7dbf999 SHA-1: 6a03b0fca828f12400526b358c9b52a3d09dfdb4 SHA-256: 6c210da169644508a4600ed5b099b566f3fd5afb78bb491e2087221c742e50a4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=basic+english+usage+michael+swan+pdf PDF link annotation
    • http://webcam-model.online/48729818631xv1ld.pdfIn PDF document text
    • http://healsmall.space/mikroilemci_ders_notlar9pdrg.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/ggibPhe/pocket_rally_lite_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/1Rgeifu/centipede_movie_netflix.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/navy_pregnancy_instruction_prtc2rjm.pdfIn PDF document text
    • https://cdn.sqhk.co/votiwixuduzo/gDjj4hh/4606829248.pdfIn PDF document text
    • https://cdn.sqhk.co/telivagawu/ZIXKWOG/post_office_day_after_thanksgiving_hours_2017.pdfIn PDF document text
    • http://faloken.22web.org/deep_freeze_alternative_open_source.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/gpEd8gf/wave_live_wallpaper_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/eghqjge/2838879467.pdfIn PDF document text
    • https://cdn.sqhk.co/tatakakuwito/dkhfXhd/chennai_super_kings_retained_players_price.pdfIn PDF document text
    • http://idealica-it.website/jemajidefafevolu9ztln.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxejelun/iidgdV2/glo_cafe_ghana_apk.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
    • https://uploads.strikinglycdn.com/files/1e55dab3-abb8-45b9-a3e2-908c643cf22f/pagoxevawajofu.pdfIn PDF document text
    • http://maguvunu.epizy.com/sheet_metal_punch_and_flare_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/895c3c33-574f-4325-8468-d9292c3dcaf5/wadob.pdfIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_63130188a1aa4eacaff19f39e27bce6b.pdf?index=trueIn PDF document text
    • http://zifawikixeliba.epizy.com/43346069273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb3e3a03-4080-4972-b201-185fe3689087/m2n68-la_narra5_cpu_support.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_e2c084281b9646b9a9d5ebead3c53755.pdf?index=trueIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_059d389ad9904d4696cf53179ef0dac4.pdf?index=trueIn PDF document text
    • https://0f7a2101-273c-4f7f-b1fd-079d1ad923c1.filesusr.com/ugd/a7ea6f_e16a3e72104a4ae8acaff658791f31d9.pdf?index=trueIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_4ff87598ec20484cb1fc8a0de0a6b4c1.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 5308 bytes
SHA-256: c38ecb4513f1582c6438e85ff920d4ba76c1bd9952597d75ee3cb77187dafbe6
font_01_sfnt_off000104c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C6 11744 bytes
SHA-256: ac5381880b5f455562bf8ab6f5de884e08c08cd12788c7a8dfb22edbcf767c57
font_02_sfnt_off00012c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9E 16084 bytes
SHA-256: dd003ab6b3fc3a451384952dc652c5fa5bce06a9b3c4d992b98c25fd7829260c
font_03_sfnt_off00014154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14154 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.