Malicious PDF — malware analysis report

Static analysis result for SHA-256 2589995a8fbad422…

MALICIOUS

PDF

78.3 KB Created: 2021-04-10 21:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1e5b5f4022993994d32fe4a3c3da312c SHA-1: 71404f923c72c61ac7d84cf5efb95989eba7f976 SHA-256: 2589995a8fbad422c9eeaad639fc4471fbdeb38c4a61b526331e435db313eb13
156 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious, specifically as a phishing trojan. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, with one prominent example being a Weebly hosted PDF. The embedded URLs suggest an attempt to redirect the user to potentially malicious or deceptive content, aligning with phishing or link farm attack patterns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/strik?utm_term=depth+of+knowledge+4 PDF link annotation
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/2348347.pdfIn PDF document text
    • http://axecheat1.xyz/sexiest_man_alive_2020_voteq7ie9.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/uwXGshj/biters._io_unblocked_games_66.pdfIn PDF document text
    • http://itash.space/om_mani_padme_hum_original_extended69k09.pdfIn PDF document text
    • https://negogepif.weebly.com/uploads/1/3/0/7/130775604/7593861.pdfIn PDF document text
    • https://mewotetinud.weebly.com/uploads/1/3/5/9/135956813/404467cb3bb2918.pdfIn PDF document text
    • https://gikanusubidi.weebly.com/uploads/1/3/4/7/134756500/kuwemuniwuguj.pdfIn PDF document text
    • https://nekuferalota.weebly.com/uploads/1/3/1/4/131406939/fanarida.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/4iaPchh/25110462518.pdfIn PDF document text
    • https://kuxorife.weebly.com/uploads/1/3/5/3/135313812/4629872.pdfIn PDF document text
    • https://cdn.sqhk.co/pugalaleluti/mhhoidp/general_motors_arlington_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/hcLii72/insideout_wellness_wenham.pdfIn PDF document text
    • https://sopazavevorud.weebly.com/uploads/1/3/4/3/134370644/gazavepimawipogo.pdfIn PDF document text
    • https://jumirusuvowelu.weebly.com/uploads/1/3/4/6/134632856/molaxixerowemajeb.pdfIn PDF document text
    • http://obschee.xyz/96993505942kb24m.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/toad_for_oracle_11g_free_download_fus4pqy.pdfIn PDF document text
    • http://spain50off.info/xuxowamivitegefowelirufu18wh6.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/nekuxapanizije.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/fejakixoweka/big_ideas_integrated_math_1_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/22925076377.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/gracie_jiu_jitsu_curriculum.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/lejijuludedejadog.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/exfat_allocation_unit_size_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/garden_state_parkway_south_traffic_report.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_off0000f6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BC 5060 bytes
SHA-256: 79eceeae5283bcb206d1f247e92c92285f1bfe5f6b6aba9ec5bab79f9d3fad07
font_01_sfnt_off00010819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10819 10384 bytes
SHA-256: f3deccb42be30ae7d29de80e2807c68e024010d1ff2f339ba175cb778621ac4f

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