Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d263fc41273c08…

MALICIOUS

PDF

80.4 KB Created: 2021-04-27 20:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 35b616c2f6d0df5a8669e36446900078 SHA-1: 931d3eddf3f51ee109d384d020f9dc651fdd670b SHA-256: e3d263fc41273c08033cb7f8ef84d0da005d1817d4afe4e8222d1654ca9bf459
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, directing users to various websites. One prominent URL is http://chatik85939775.fun/canon_mf4450_scanner_toolbox719f7.pdf, which is part of a suspected malicious link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://fokemale.ru/strik?utm_term=5+inch+height+gain+exercises PDF link annotation
    • http://chatik85939775.fun/canon_mf4450_scanner_toolbox719f7.pdfIn PDF document text
    • http://muxoman.mygamesonline.org/use_articles_english_grammar.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/technical_writing_download.pdfIn PDF document text
    • http://ruvogodozipabiv.scienceontheweb.net/altium_designer_tutorial_full.pdfIn PDF document text
    • http://dk-inc.xyz/uworld_nclex_notes_free_download1fs5j.pdfIn PDF document text
    • http://kuwegatopu.iblogger.org/brunei_government_system.pdfIn PDF document text
    • http://brightshopbg.xyz/bikuxefogmkth2.pdfIn PDF document text
    • http://reawolt.online/42682725357y2kn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_0b4119df1a7847feba913badca41f7d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebejos/texas_drivers_license_written_test_study_guide.pdfIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_0ee38d674d834194aa9f23f79cc88804.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/osha_corrosive_chemical_storage_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/8411497072.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/zapixapodenopezizasiwona.pdfIn PDF document text
    • http://nijesawojate.epizy.com/how_much_transmission_fluid_2002_honda_odyssey.pdfIn PDF document text
    • http://nozozuwovore.atwebpages.com/lullaby_of_birdland_score.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/new_hypertension_diagnosis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/blender_2._8_game_engine.pdfIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_441a3b1973c343eca21b246552cde812.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rirusozo/what_foods_have_gluten_free.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_fb8635153cdd48d296fd1966301c1042.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/how_a_tv_show_gets_made_vox.pdfIn PDF document text
    • https://deed868a-3c3f-4b0d-b3ae-f9ebe8a38c33.filesusr.com/ugd/95283b_8e809d3aba944b6f9f8419599fae09fb.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_off0000fcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF3 5124 bytes
SHA-256: f27bde469cae36ae8e03b9bdd521b492cbf00861c0786583d8555f79398c16b3
font_01_sfnt_off00010e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E67 10908 bytes
SHA-256: aa7e34658021817e6ef7338d6ee7f4036a6034a33377c447cd7d58f54bce5deb

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