Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffad22d0ea34f50…

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 04:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f6d7ab39b54008fa1aee4ffdbf8edb98 SHA-1: b1ba33228b128240d269bede4a9d51242edde07c SHA-256: 2ffad22d0ea34f50f85207f6ba85bc2116ad6cc907c95a514964d3c277386d20
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/wix?keyword=psx+emulator+apk+for+android+free+download PDF link annotation
    • https://cdn.sqhk.co/gufojakig/dhdhhhd/52910891609.pdfIn PDF document text
    • http://subeziti.22web.org/86829691423.pdfIn PDF document text
    • http://present-mag.ru/fimawenoxirrdbg.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/0Kmgeci/vr_lens_lab_coupon_codes.pdfIn PDF document text
    • http://lisolu.org/jandy_lrz_pool_heater_troubleshooting_guidelcp12.pdfIn PDF document text
    • http://wufutawolemipa.22web.org/bangla_alif_laila_full_hd_video.pdfIn PDF document text
    • http://sokadap.22web.org/meri_pyari_behaniya_banegi_dulhaniya_song.pdfIn PDF document text
    • https://cdn.sqhk.co/gixenerusivu/jgmqigR/enemy_strike_2_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/wusuzevomo/hggcEIh/best_paranormal_movies_on_netflix_2019.pdfIn PDF document text
    • http://buytoday.cc/aprendizajes_clave_para_la_educacion_integral_educacion_fisica_educacion_basicab9twy.pdfIn PDF document text
    • http://xelapelumu.iblogger.org/nakuru_county_bursary_form.pdfIn PDF document text
    • https://cdn.sqhk.co/gatutojuse/heahhig/25638296795.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vofazos.epizy.com/best_workout_songs_of_all_time.pdfIn PDF document text
    • http://rojazudawawuse.epizy.com/the_economist_21_july_2020_download.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_off0000daba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABA 5412 bytes
SHA-256: 55bb4b24ae563382135e0d10f3c566caa3ab7a666f762ce55c7597169781352b
font_01_sfnt_off0000ed22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED22 16536 bytes
SHA-256: cc01b2a177cf9fdba08d31f237ea8f4a60daa82d6e4da339be00fab25cb8a963

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