Malicious PDF — malware analysis report

Static analysis result for SHA-256 d195098e6bd48fdd…

MALICIOUS

PDF

83.3 KB Created: 2021-05-04 00:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 816b55d604143776d199db3487f62715 SHA-1: dcf823cdf07c10a6c34150274c76e412d7090121 SHA-256: d195098e6bd48fddd0ed1e85d0a9471ed0d7e3c2b8fcaa537795edd404e17419
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://maypoin.ru/strik?utm_term=how+to+prepare+for+sat+math+2 PDF link annotation
    • http://tixshopclub.space/miludabexetebisimijibbmpmy.pdfIn PDF document text
    • http://puzezaxu.22web.org/70-743_passing_score.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/resistance_tube_workout_routine_printable1c92s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492272/normal_60171f1be368b.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/dell_optiplex_9010_cpu_i7.pdfIn PDF document text
    • http://cleanup-sale.site/how_to_write_a_topic_sentence_grade_4kkv37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457862/normal_600cec445cd17.pdfIn PDF document text
    • http://jajokojunewi.mypressonline.com/60024281939.pdfIn PDF document text
    • http://prod-fruit.space/703150272779a62t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486033/normal_601d1ed1e0ac3.pdfIn PDF document text
    • http://organicnu.info/tom_clancys_the_division_2_pc_revieww7hcy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481836/normal_606387b9bbc50.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/da7b8757-3cdb-468b-91e4-77f13a787f8e/sinopsis_novel_hunger_games_catching_fire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7296f59-669a-4bb9-87ed-2ccfc747c738/is_11th_physics_tough.pdfIn PDF document text
    • http://wupogegefug.epizy.com/jiduvoduduworeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d499188e-1c65-4040-a38e-1d2f7c649d02/how_old_is_percy_jackson_in_book_1.pdfIn PDF document text
    • http://lufepurobu.epizy.com/3837519131.pdfIn PDF document text
    • http://vamanufa.rf.gd/university_of_auckland_international_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b44a8a-df34-4704-8a09-767b314a27ad/94353337621.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/65216170454.pdfIn PDF document text
    • http://nejesinila.epizy.com/generative_adversarial_networks_with_python.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_off0000f0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D8 5292 bytes
SHA-256: 0a8e6925838018441163c9326e9b3a276098210541ce678fd614ad79cba0532c
font_01_sfnt_off000102be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BE 11352 bytes
SHA-256: e110951cd3f62ed21f9ce2c85742b27169c9270287888800b3ad99898936caae
font_02_sfnt_off00012976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12976 16072 bytes
SHA-256: 24c5c481937acf4f4841e6563a6d7a18cfdb810806c94b09ac0ff4033348c1e6

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