Malicious PDF — malware analysis report

Static analysis result for SHA-256 df53e16ebe86f9da…

MALICIOUS

PDF

68.3 KB Created: 2021-01-23 21:48:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fc7d104ca4ce9a5a2fa8f51a83c2e14c SHA-1: 2ebe06c54ec9df68c8ba40e379ac2c9d63f047ce SHA-256: df53e16ebe86f9da6e23a46b6cb8dda4651d08777ee01712b7b1502925c9c4a8
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs further supports the malicious intent of directing users to potentially harmful external 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/123?utm_term=roof+cross+bars+honda+crv PDF link annotation
    • https://site-1203683.mozfiles.com/files/1203683/44960515433.pdfIn PDF document text
    • https://famalekirujapa.weebly.com/uploads/1/3/1/4/131453917/9913576.pdfIn PDF document text
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/topedoge.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/ia6hhgX/city_racing_3d_apk_download_uptodown.pdfIn PDF document text
    • https://site-1168209.mozfiles.com/files/1168209/cancionero_infantil_acordes.pdfIn PDF document text
    • https://site-1176609.mozfiles.com/files/1176609/80747125450.pdfIn PDF document text
    • https://site-1176085.mozfiles.com/files/1176085/shelterlogic_parts_13104.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/hegKhda/c_compiler_ide_download.pdfIn PDF document text
    • https://site-1172723.mozfiles.com/files/1172723/grey_and_black_checkerboard_vans_platform.pdfIn PDF document text
    • https://site-1179818.mozfiles.com/files/1179818/stick_war_legacy_pc_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sorubajuzoxe/8U1jdve/sky_factory_map_download_for_mcpe.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/wuvepilamamuse/picsart_mod_apk_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/recommendation_letter_example_template.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/68273662143.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/baghban_movie_720p_worldfree4u.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0D 5284 bytes
SHA-256: 662bd8cff2a9683cc7f1e39b4944559735c912e2abfc159e03107176334eb448
font_01_sfnt_off0000e10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10E 10224 bytes
SHA-256: 97d013829ade2f91b50aa049ff7976ec8a2ec064edf2164e9e6ed498ce3cb007

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