Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbacd4a472ca09b4…

MALICIOUS

PDF

85.3 KB Created: 2021-05-01 02:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9af98011b099a34b4ca35d17a8709b65 SHA-1: 05a07f2ca455dea032ba44f1ea5465eb18e83ffb SHA-256: fbacd4a472ca09b4cbed03b8f46a7545bd87317dd9ba392904d2922653e6a802
244 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URLs suggest a phishing or scam attempt designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=after+we+collided+book+barnes+and+noble In PDF document text
    • https://boviseweduxiraz.weebly.com/uploads/1/3/0/7/130776594/dofojilefokinaz-wodaz-pakuxubi.pdfIn PDF document text
    • https://xapitutas.weebly.com/uploads/1/3/0/8/130813648/93d5fa0f7c1ff61.pdfIn PDF document text
    • https://vukajikabazaxeg.weebly.com/uploads/1/3/4/7/134711597/6067390.pdfIn PDF document text
    • http://medway24.com/bobotazuwt61w8.pdfIn PDF document text
    • https://vawudida.weebly.com/uploads/1/3/4/8/134890241/f90a6c.pdfIn PDF document text
    • http://unlockdeals.shop/how_to_find_the_sum_of_rows_in_pascals_trianglevwtka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463552/normal_606cb8110d068.pdfIn PDF document text
    • https://garujidizog.weebly.com/uploads/1/3/1/3/131398488/pibabune.pdfIn PDF document text
    • https://damenuxorofupob.weebly.com/uploads/1/3/4/7/134711178/pewudu.pdfIn PDF document text
    • http://subfamjtii.site/61836951357in99l.pdfIn PDF document text
    • https://levarimabogi.weebly.com/uploads/1/3/5/3/135328943/addb70f023cd2d.pdfIn PDF document text
    • http://srakan.space/wefanabonb0292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_6027934bb4a1f.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/160795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464851/normal_5fdc394bd584b.pdfIn PDF document text
    • http://instapriz24.online/various_types_of_guided_transmission_media3kiqb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/sheet_music_for_jingle_bell_rock_piano.pdfIn PDF document text
    • https://74a5c9af-61bb-4d76-9351-4d02c0bf652a.filesusr.com/ugd/e33828_17ae90769f6c442dbea1d9c61561188e.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_bb58463291e74842890bbeceb3f71933.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakusineba/paint_by_numbers_custom_canvas_uk.pdfIn PDF document text
    • https://23fe9111-5aa3-4288-b7a4-a84c242bb647.filesusr.com/ugd/d35b85_00e51c410f514962a2aee1a8c0de6592.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zakunafu/movozitokuzajirajimi.pdfIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_293c2d2f9fcb4c3a998116a8b76a2e5a.pdf?index=trueIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_c9eaf68a9b5a466682ce67f1594197c1.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDB 5300 bytes
SHA-256: 1ebbffd2817b3aa46c7d4f4c54d0b5b03e2a5900917605f8b959c9e2021c7715
font_01_sfnt_off00011e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E06 11864 bytes
SHA-256: 716c98496511fc405b1ceac3da1d4f6f336db15e8e9d191d52e8e9039893c409