Malicious PDF — malware analysis report

Static analysis result for SHA-256 24229474d70fe991…

MALICIOUS

PDF

81.6 KB Created: 2021-03-22 10:44:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 89cf86815c4d76ca8d6ba6b4877f11cc SHA-1: 41074ec5beed6b4d1f265b17e36d4f68a7f8e965 SHA-256: 24229474d70fe99154c72b102e80d24f89e13504b2f35e572e4d79edcfbcf1cf
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt 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
  • 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://kuzutuzo.ru/aws?utm_term=mini+cooper+r53+owners+manual+pdf PDF link annotation
    • https://xemedibapasuv.weebly.com/uploads/1/3/2/6/132695509/tiditake.pdfIn PDF document text
    • https://zegirapenutiv.weebly.com/uploads/1/3/4/3/134393596/repipedevunabo-lodaxenab-kosafuravux.pdfIn PDF document text
    • http://jodesomuxuduzu.22web.org/ism_code_and_guidelines_2018_edition.pdfIn PDF document text
    • http://gidepel.22web.org/66365274801.pdfIn PDF document text
    • http://rokamik.iblogger.org/the_ones_who_walk_away_from_omelas_quiz_questions.pdfIn PDF document text
    • https://tetufimaburovi.weebly.com/uploads/1/3/4/0/134098130/xekunowepevozebumeg.pdfIn PDF document text
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/90dcb.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/1280375.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pujifobekef.epizy.com/33667819255.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/tozepovukegaxebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e257a7f7-9d5b-45e5-ac3c-0022cb2712ee/what_is_a_public_relations_assistant_job_description.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0c0c33d-163b-4805-8b83-e79597988dd3/datirowivutix.pdfIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_6f77eb13170049bba4ea5041c402cfe5.pdf?index=trueIn PDF document text
    • http://sawokinajiralar.rf.gd/certificado_de_origen_tlcan_formato.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/povinurudagu.pdfIn PDF document text
    • http://tajafenabuwibas.rf.gd/can_you_breed_daphnia.pdfIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_1f13af8f44c547e3a7b03fff7b5dc0c6.pdf?index=trueIn PDF document text
    • http://dopisudul.epizy.com/best_gba_games_to_play_on_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/018f49a1-c66d-4b42-a131-20121b5b027a/first_aid_pocket_guide_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/businessman_full_movie_hd.pdfIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_c19545bed13441a0aa515960ea6698b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78c2b8b-3c47-4f91-acf7-194fd77c8017/wings_of_fire_dragonslayer_sky.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11006535-7d24-46a9-a1ba-879671774ae2/87809608938.pdfIn PDF document text
    • http://magotabitujotu.rf.gd/nosakokoxafodapipig.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_off0001013d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013D 5688 bytes
SHA-256: 076f2bb6e364c32629cc97c04c224fc08ffd89f6cee251dcb40a2bc6ba06602e
font_01_sfnt_off000114a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A4 10712 bytes
SHA-256: dc03eafd5edaf06faa8d550d0d406f735450485583c3cd19bddcef13d5676c0d