Malicious PDF — malware analysis report

Static analysis result for SHA-256 716221c997033497…

MALICIOUS

PDF

65.3 KB Created: 2021-02-20 13:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8c161119892e7ba1c363d1ff1547ed89 SHA-1: dfe6bea10203357730020539fe1ccb169ed57a86 SHA-256: 716221c997033497fc0b595eae640a403fb202ab9e168d5b0778efae8535691c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'maypoin.ru/strik', suggesting a phishing or SEO poisoning attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the PDF structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=omron+h3cr-a+pdf PDF link annotation
    • http://save50it.info/excel_vba_protect_unprotect_all_worksheetsc2m3k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454808/normal_5ff17beb3cd37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380082/normal_5fef38352192f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386620/normal_600625b4e25b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412607/normal_6029372717db5.pdfIn PDF document text
    • http://profyhouse.ru/xegomakobibunomuzowam26lf.pdfIn PDF document text
    • http://ita-bio.fun/rurustfw2g.pdfIn PDF document text
    • http://alsamcctv.com/barbie_movies_in_tamilbnkyc.pdfIn PDF document text
    • https://xidoxuzi.weebly.com/uploads/1/3/4/7/134707988/nasumafixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5fe663dcadcb8.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/nevowimo/alanyaspor_yeni_forma.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/60848426478.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/good_morning_image_photo_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/zigawoguxilikuru.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/gree_air_conditioner_remote_control_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/free_lame_for_audacity_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/volunteer_service_hours_certificate_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/75422791220.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/c_o_c_hack_version_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/lavomotale.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_off0000c24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC24A 5408 bytes
SHA-256: 57e3ef52fc886bd756870d89ee5f2e739cfcf198595efa9044421a1cb59b389a
font_01_sfnt_off0000d48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48C 10632 bytes
SHA-256: 8b7592f789b21bb6c59f28532ef44017ed5f097415b30e33adc93ac7994a66f2

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