Malicious PDF — malware analysis report

Static analysis result for SHA-256 933df42fca212f0a…

MALICIOUS

PDF

78.9 KB Created: 2021-04-08 02:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c2361855633e1d381dcd484cec87037d SHA-1: b28c322eb3ff06ba8031a8991707a9e84655c54d SHA-256: 933df42fca212f0a435eee8e25841904cd8626cd255f71545b78e359865fc797
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=farberware+air+fryer+toaster+oven+rotisserie PDF link annotation
    • http://dommasters.site/jemurikadexaji7w5pk.pdfIn PDF document text
    • http://hugertely.xyz/how_much_do_viking_sewing_machines_costsfe7k.pdfIn PDF document text
    • http://sendgrid-de.com/graco_pack_n_play_on_the_go_stratus1ruyj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424331/normal_5ff970ca21c3d.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/how_to_get_legendary_adopt_me_pets_for_free19pto.pdfIn PDF document text
    • https://rosififobagas.weebly.com/uploads/1/3/1/1/131164218/roxasomu.pdfIn PDF document text
    • http://top-odejda.com/sivaradixaguraga2h5r2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414688/normal_6010f5cca9a86.pdfIn PDF document text
    • http://intekzafast.online/fezefvwvpi.pdfIn PDF document text
    • http://vovpomnim.ru/tejedopiwufewavidafemamuswytxa.pdfIn PDF document text
    • https://mewukonil.weebly.com/uploads/1/3/4/0/134096476/2514482.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/kimone/reviews_on_raypak_pool_heaters.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/ridgid_wet_dry_vac_remove_filter_for_water.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/81362076090.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/fuxorudiki.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/primary_source_verification_report_naric.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/creative_resume_templates_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/83290486878.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_off0000f7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A7 5080 bytes
SHA-256: 997f1641ec492fd4d4187a9c030e1efdd7521944a1c38444f8085ce7512a6d68
font_01_sfnt_off00010923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10923 10984 bytes
SHA-256: 1231b650e80958cbe8e470d5a4a9139f3abf48ba0f554b6f719c99b6f565af9a

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