Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d26d6c336b91731…

MALICIOUS

PDF

73.3 KB Created: 2021-03-10 20:34:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ef62b7a429ee6b5cfe0ae5c74d97f8af SHA-1: 46329d6ce68970586672815c8803968f2fce9415 SHA-256: 1d26d6c336b91731f4739c04902301c22bf88be7c188c90d689ee9b4915bb122
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain associated with phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or redirection scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to redirect users to malicious sites.

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://jottigo.ru/award?keyword=les+assemblages+bois+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381547/normal_5fd0da1a3882a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497081/normal_5fd651d422a2d.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/hWTjfhb/19575636630.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/dzgeJje/bloons_td_5_download_free_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/dolavalof/jh6ighh/go_all_night_long_lyrics_mgk.pdfIn PDF document text
    • https://cdn.sqhk.co/xusozapovu/9QqijdK/kexomamafasofopurojigofe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_556fe55ac9954ff98c88e54d7ec71542.pdf?index=trueIn PDF document text
    • https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_4e5136e1d98e4ba384ba583071b449ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/45419863697.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/swift_numberformatter_rounding.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/45337185693.pdfIn PDF document text
    • https://01ff271a-2d66-4e22-ac0f-a796646d2f56.filesusr.com/ugd/8d93e9_6c6d85c0091e4530b9896c0ab608a579.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/rinazimosa.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/general_caste_aarakshan_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/les_centrales_hydrolectriques_du_cameroun.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/office_365_send_quarantine_report.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/25458905865.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_off0000df7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7C 5344 bytes
SHA-256: 78cafea5111a869ef79ad9c8d96859c04f1310c2d47f9fe739a622679c542d74
font_01_sfnt_off0000f19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19B 11740 bytes
SHA-256: b2ddd9971c645615a0cacf7a61f2812f2c54026145c6338b7c26507eb19c63e3

Open this report in the interactive analyzer, or submit your own file for analysis.