Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b6015d323f7f47…

MALICIOUS

PDF

82.7 KB Created: 2021-04-17 21:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 106d3b173dda89b975ba4e8200538856 SHA-1: 11e28948dc36416dc6e2e85da327b50a891c9b10 SHA-256: 25b6015d323f7f4774790b68dd33d7b670d7fa05b34b455d006b31039129566b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/strik?utm_term=warehouse+safety+checklist+sample PDF link annotation
    • http://creampiepow.club/959116075460evlu.pdfIn PDF document text
    • https://nojilino.weebly.com/uploads/1/3/1/4/131407263/xixevovejo-nobenevixi-bajozusonupe.pdfIn PDF document text
    • https://risimapi.weebly.com/uploads/1/3/4/3/134321435/gusovasemabivijaxoxa.pdfIn PDF document text
    • https://nudiwosesi.weebly.com/uploads/1/3/4/3/134317077/gedegaduz_beberolalor.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://vematonejos.weebly.com/uploads/1/3/1/3/131383464/tirupeji_fimudusanek_wigepu_fomujizukuwe.pdfIn PDF document text
    • http://nutristrike-shop.ru/introduction_to_psychology_textbook_4th_editiontynbw.pdfIn PDF document text
    • https://vabakapis.weebly.com/uploads/1/3/1/4/131453405/0a99f6f.pdfIn PDF document text
    • https://fejaxipanegis.weebly.com/uploads/1/3/2/7/132712099/89ab1348.pdfIn PDF document text
    • http://buylettersonline.com/c_2012_programming_black_book_covers_net_4.5_download4ddmk.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/rajuk.pdfIn PDF document text
    • http://bokaxakoz.sportsontheweb.net/punctuation_comma_rules.pdfIn PDF document text
    • https://gekubele.weebly.com/uploads/1/3/2/6/132683169/fejemajesefegi_vititolapibodej_gusitaxifizevut.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/1a4506e8-4da9-4d94-84f0-a429d4d6a176/cbse_class_7_english_grammar_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/install_via_setup.py_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c268a86a-508a-48af-aa9a-ee99c4263e31/sex_education_3_temporada_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/98588510996.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/cpu_benchmark_test_android.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/jagegogamipikaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3903c582-ade1-420d-adc6-ec2a0e686cd9/fafedugipi.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/battleship_game_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05eec63a-71ae-4765-a727-1dfd06df0551/devevofufofijawik.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_off0000f7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 5208 bytes
SHA-256: 13f8ac65ac4b4146f1348cb21f6efb7b4c3df9a89fd4cc6a0749b815216e60c3
font_01_sfnt_off000109bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BB 11448 bytes
SHA-256: ba0b830dfc72fa0064fa38805000ba61df7ae5ae3d86b0927a8ee8a053761f28
font_02_sfnt_off00012f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361