Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a8d64d8c9f8993…

MALICIOUS

PDF

80.5 KB Created: 2021-02-17 19:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: bf981181c259ac407d9cbe608b4314f4 SHA-1: 3a07ff674f055f7e71d07205588a7d5e07afed91 SHA-256: 17a8d64d8c9f8993f55dcf1821b9c7489ee74c5879925b78987d1f6e5796ad68
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the presence of external URLs and the 'ML_NYX_PDF_MALICIOUS' flag strongly suggest a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=how+to+read+car+electrical+schematics PDF link annotation
    • https://guxenebulofoto.weebly.com/uploads/1/3/2/8/132814975/2636152.pdfIn PDF document text
    • http://bathforlegs.xyz/flight_simulator_online_mobilemohku.pdfIn PDF document text
    • https://gononazenikemad.weebly.com/uploads/1/3/4/4/134482012/683181.pdfIn PDF document text
    • http://socialwave.me/day_of_the_dragon_king_book_reporthe8l0.pdfIn PDF document text
    • https://paporese.weebly.com/uploads/1/3/1/0/131071113/9217b4064cfe8.pdfIn PDF document text
    • https://rubuvewoxuvima.weebly.com/uploads/1/3/4/8/134873715/nodemoki.pdfIn PDF document text
    • http://nicechange.space/aptamil_soja_3_informao_nutricionalwc7n8.pdfIn PDF document text
    • https://lupagizan.weebly.com/uploads/1/3/1/6/131637074/a2545680c0a.pdfIn PDF document text
    • https://denesibupu.weebly.com/uploads/1/3/0/7/130774977/9519570.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/sixolose/4793755011.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/counter_strike_1._6_cheat.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/el_evangelio_de_cagliostro_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/87324061303.pdfIn PDF document text
    • http://kasedabinat.rf.gd/pidijuwozalezimatabusesu.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/bodoni_72_oldstyle_book_font.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/michigan_real_estate_exam_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/lovekorolanawutuxez.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/16481057069.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09F 4916 bytes
SHA-256: 97b50a462889c07c83f361c7044e9d8c5531d4974c191c879bb32852a87a5e06
font_01_sfnt_off00010159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10159 11268 bytes
SHA-256: e65cef6cf6c284ffbab3aa060811288e081621c13343512c655a8dd3a0406d47
font_02_sfnt_off000126df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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