Malicious PDF — malware analysis report

Static analysis result for SHA-256 899b80c6108104a0…

MALICIOUS

PDF

72.0 KB Created: 2021-03-03 19:21:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec51c21b4703c34ca7ae7bcd2bd26104 SHA-1: b7109b6a31e3aea2179ce4dbc40682326ddb7341 SHA-256: 899b80c6108104a0e653d8823d057a540c2ff7d5064f1213f413523b8e4950c3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or scam operations, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=how+much+money+to+start+a+music+production+company
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/japibuvokibanijenit.pdf
    • http://netezasodi.22web.org/agnes_waters_surf_report.pdf
    • https://cdn.sqhk.co/sesijisova/ZWTpTih/32261013597.pdf
    • https://cdn.sqhk.co/josedinis/id1yhdv/39512298287.pdf
    • https://cdn.sqhk.co/ripalufix/gexD3V0/11838756882.pdf
    • http://gosofimasuwemig.iblogger.org/zaful_uk_size_guide.pdf
    • https://giburonolunege.weebly.com/uploads/1/3/1/4/131406036/razojezisi.pdf
    • https://cdn.sqhk.co/lojadisexudo/Mjgihao/just_smash_it_rage_rooms_orange_park_fl.pdf
    • https://fejaxipanegis.weebly.com/uploads/1/3/2/7/132712099/c69d2eff7.pdf
    • https://cdn.sqhk.co/fujotojaxob/IjbjOgi/notepad_app_iphone_free.pdf
    • https://cdn.sqhk.co/moturalogupe/hskjhjg/diep._io_tree_2020.pdf
    • https://cdn.sqhk.co/dixejetafap/fIcXFyr/how_do_i_change_my_voicemail_passcode.pdf
    • http://tamizatej.22web.org/johnson_seahorse_5.5_hp.pdf
    • http://siwosupegejolop.medianewsonline.com/xibaliviwugisik.pdf
    • https://cdn.sqhk.co/jisesixerigu/hih0lDU/mart_lifestyle_reviews_dino_racer.pdf
    • https://cdn.sqhk.co/doporaba/VtS7jjp/cake_maker_story_cooking_game.pdf
    • https://cdn.sqhk.co/volumusigu/iiRghhe/is_soccer_football_in_australia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rotitujazolu.rf.gd/47800971205.pdf
    • http://bavotuvezomevi.myartsonline.com/parts_of_speech_worksheets_grade_4.pdf
    • http://sujosivetobifir.epizy.com/zekolelu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da67.bin
cab7f77a66f224faa79a290bd583706ed74c485c8b00556b162d39821b7b7a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA67 5436 bytes
font_01_sfnt_off0000eccd.bin
ce24ed39b023057f569fe5ab2042becb40c4b7e9a384e1067cb5a548ccf81bee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 10960 bytes

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