Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d8d004857c5298…

MALICIOUS

PDF

81.5 KB Created: 2021-02-28 18:17:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8a0502db3a495fe1e3f327e7b966376f SHA-1: 42086979a405462270505523fb1425808b4e90fa SHA-256: a0d8d004857c5298abe2d0bfd35b590d7483c25532b11619ab684994f382aced
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=painful+rash+on+legs+after+shaving PDF link annotation
    • http://goodsun.fun/greek_gods_and_goddesses_list8fvd3.pdfIn PDF document text
    • http://6gusevshop.space/design_sponge_travel_guide_bostonhefu7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489041/normal_6020456e2059d.pdfIn PDF document text
    • http://bestcreditcheck.info/ccna_200-_125_book_todd_lammle3p2sb.pdfIn PDF document text
    • https://simisasokudu.weebly.com/uploads/1/3/4/2/134235492/misubawofud.pdfIn PDF document text
    • http://specrazreshenie.com/40320818999c46a6.pdfIn PDF document text
    • http://topfrag.rip/schedule_d_2017_tax_worksheetp68yt.pdfIn PDF document text
    • http://veronaital.space/will_vusu_let_you_download_avengers_infinity_war6jgmb.pdfIn PDF document text
    • http://livethailand.fun/line_6_floor_pod_plus_manuale_italianoi3l8v.pdfIn PDF document text
    • http://itravelimpressions.com/206428900014iagm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417669/normal_5fcbe5c510ec5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lokijuronig/google_sheets_filter_vs_filter_view.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/88211566198.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/revenue_department_gujarat_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/toxoplasmosis_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/96879046670.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB8 4972 bytes
SHA-256: ec8dd53bb7b194b493210cf612d962a69267a3b8c1b630dd8e6dc57ef301e7df
font_01_sfnt_off0000ee9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9A 10856 bytes
SHA-256: e3114d8923fb0e4751e7ab31e59bbabfe54e188c9d04ed6903c5ce670389a22e
font_02_sfnt_off0001140c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140C 16084 bytes
SHA-256: 6793135c9d5f2d9402216549edf66541f87ac1c2d7f717693568b2625ec966b3
font_03_sfnt_off000128c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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