Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d62dfa4ca14791…

MALICIOUS

PDF

78.3 KB Created: 2021-05-23 22:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 284dd6757821590bae68084f6ad1fa18 SHA-1: 5064602650283b0180a8229c0c9e05bbca10d8b3 SHA-256: 47d62dfa4ca1479116075cda635cc6e14b73a083080cc646e61eb55ff70fe227
194 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 0.9998

Heuristics 7

  • 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.
  • 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://gimoguvi.ru/strik?utm_term=the+supernatural+ways+of+royalty+workbook+pdf PDF link annotation
    • https://nibivesulekot.weebly.com/uploads/1/3/4/0/134017222/jotelad.pdfIn PDF document text
    • https://bagubabijotete.weebly.com/uploads/1/3/4/3/134319258/429a87cad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_60164b561ec68.pdfIn PDF document text
    • https://xufetujada.weebly.com/uploads/1/3/4/7/134745175/3018809.pdfIn PDF document text
    • https://lodetisider.weebly.com/uploads/1/3/4/7/134732723/96dd377584731bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_601cff913e09a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_60196488c7ea9.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/detovavilupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_6040227969c43.pdfIn PDF document text
    • https://vuvopovakufusoz.weebly.com/uploads/1/3/4/3/134342968/zoworelegetujodapowo.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/834ae2.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/1f282701-5fbf-4e1d-9e07-c0baa4c52d8a/how_to_properly_hold_a_glock_43.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f502ba2f-7370-4a81-92fc-e9ebb47e8395/how_long_does_a_trane_unit_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e96ea095-dac4-46f8-84e7-93f405a12fe1/10916156551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1eaaf33-c6bd-452f-919b-df2785ba6557/ford_explorer_spare_parts_in_saudi_arabia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec352fe-853c-4d67-aee7-b672dc27939d/78762592193.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/avadhuta_gita_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09bb7a5a-179e-4908-a1dd-aa0ac6175ed9/62422546894.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/angry_birds_epic_rpg_mod_apk_revdl.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA7 5476 bytes
SHA-256: 22037fe459b3042b3447ba35f9c494efd3f93b39d3c532755da3fee76792f7e2
font_01_sfnt_off0000ee4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4F 11448 bytes
SHA-256: b9fd263916b06674ad405af81c55b12060e710a9f7fc8a1c37271e72f9a07574
font_02_sfnt_off0001158b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158B 16628 bytes
SHA-256: 91760b3401994eeaabcdd6f4de8d0953e3857c56f69ea9e7f5e3b47642338a35