Malicious PDF — malware analysis report

Static analysis result for SHA-256 417742fe76b63188…

MALICIOUS

PDF

76.8 KB Created: 2021-03-26 14:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7a90a230c1f2cb83d97983ed0ba28d9b SHA-1: d13182adbccb7b1875f776b6c772f4d7ecc0dc0e SHA-256: 417742fe76b6318832ffa87b022c3d85c37b1aec2ba4ad481efbffe958ac1c98
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged the PDF with high confidence. The document body, though heavily obfuscated, suggests a lure related to 'inorganic chemistry chemical bonding pdf', likely to entice users to click the malicious link. No scripts were extracted, but the presence of redirector links points to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=inorganic+chemistry+chemical+bonding+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4413017/normal_5fde6c96c0d71.pdfIn PDF document text
    • https://cdn.sqhk.co/samofetob/jjiEhiv/music_capoeira_paranaue.pdfIn PDF document text
    • https://bunozejat.weebly.com/uploads/1/3/4/3/134387809/67f132a0ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427781/normal_60151c225a0b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_605b271759546.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/gjgcxZN/bomb_defuse_time_csgo_command.pdfIn PDF document text
    • http://wepijafiguwenan.mywebcommunity.org/blessing_and_honour_chords.pdfIn PDF document text
    • https://pokiwaminexaga.weebly.com/uploads/1/3/1/6/131637240/e48b35b5ef7321.pdfIn PDF document text
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/4474018.pdfIn PDF document text
    • https://cdn.sqhk.co/dufimogemeka/ighauic/the_defender_mod_apk_of_temple_run_2.pdfIn PDF document text
    • https://cdn.sqhk.co/kojanakif/iLubqge/74259477687.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/bjficzQ/dovokamosid.pdfIn PDF document text
    • https://galujamisone.weebly.com/uploads/1/3/1/8/131871568/bdd03e2a6e0368e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_604ef4c358a19.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/wosusamavovaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_601883ecaa100.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/antiepileptic_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/craftsman_6_hp_14_rear_tine_tiller.pdfIn PDF document text
    • http://bebojivim.myartsonline.com/agregados_petreos.pdfIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/14767046750.pdfIn PDF document text
    • http://mijugavagi.epizy.com/inverse_proportion_graphs_worksheet.pdfIn PDF document text
    • http://zetafilutebes.rf.gd/smile_even_when_it_hurts_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/2013_chrysler_town_and_country_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/52817020991.pdfIn PDF document text
    • http://logasizujonasi.rf.gd/articles_of_association_companies_act_2013.pdfIn PDF document text
    • http://dejibokakar.onlinewebshop.net/nefomiwilebikarol.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_off0000eeed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEED 5748 bytes
SHA-256: d6ce1bde7ecae1c756702b73581a44d9922be51bd75298d2d96ec274014bf1a2
font_01_sfnt_off00010258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10258 10456 bytes
SHA-256: d14f2735b0271187286ff1c173607cde95b4ce2905cf3a1d27ca2536f76e3f48