Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0f118186253beb…

MALICIOUS

PDF

81.4 KB Created: 2021-04-04 00:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 88afd059c13320d5699e0a84c90725ed SHA-1: d2f969d0e3c16ae31f00d347cd95e08dbbaca22a SHA-256: 6b0f118186253bebdc3bb13b0e5112fb980d468884e69357e86f4149664f29c2
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting a deceptive lure related to programming language PDFs to encourage downloads of other files from various domains. The presence of numerous external URIs and the link farm heuristic strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/award?keyword=syntax+of+c+programming+language+pdf PDF link annotation
    • http://vumexovuvelafe.medianewsonline.com/fesikivusiwegir.pdfIn PDF document text
    • http://sukotisibam.22web.org/76781060119.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/19723157746.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/SLqjhAP/1640130544.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/jdQsa34/beat_the_boss_2_pirate_ship_cheat.pdfIn PDF document text
    • http://teenagetutor.online/surexof2lgrw.pdfIn PDF document text
    • http://bapadama.medianewsonline.com/mckay_building_construction_volume_3.pdfIn PDF document text
    • https://cdn.sqhk.co/vawupemowa/cicCehd/kick_the_buddy_2_hack_game_download.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://tepifugamokeg.medianewsonline.com/winchester_model_94_30_wcf_saddle_ring_carbine.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/fjeOVM4/jufuzurugudogopop.pdfIn PDF document text
    • http://mandarins.space/chinese_drama_wu_xin_the_monster_killer_37gvuc.pdfIn PDF document text
    • http://gopusoduj.mygamesonline.org/abdominal_trauma_guidelines.pdfIn PDF document text
    • http://adyga.site/49284248771voxkj.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/8bba2fcb-a514-4fbb-8120-3f0ee170c4eb/xugoxanelivesinu.pdfIn PDF document text
    • http://torejejowomu.myartsonline.com/buzeparudevu.pdfIn PDF document text
    • http://wilosokanik.myartsonline.com/pneumatic_cylinder_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a43d5654-51bd-4db1-9b86-0b4363b9b738/how_to_fix_a_mini_bike_that_wont_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881d366b-d7d5-44bd-bf56-2d1ce0960766/m_audio_fast_track_ultra_8r_driver.pdfIn PDF document text
    • http://wubonaxe.epizy.com/textview_capitalize_first_letter_android.pdfIn PDF document text
    • http://zafurug.epizy.com/76542109542.pdfIn PDF document text
    • http://ripitajibewejuv.rf.gd/pufisarexefur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ef074a-a51a-426f-9765-089bfe185aa7/rijomofunijazamolesaga.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_off0000fc14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC14 5568 bytes
SHA-256: 4e16a968a879c5ebe2ed7ea73f118d1ab3a32e6828f3b7fe083333d81733abda
font_01_sfnt_off00010f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0F 12004 bytes
SHA-256: 371e2cf4783858ec800271ecb47bb2239ed7c2efb10220df2cdaa58d321b4e75

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