Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9c6ba8b8476ea6…

MALICIOUS

PDF

70.5 KB Created: 2021-01-18 22:32:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2a6b75a81e49bc34e9d32d56932a792a SHA-1: 0cab7bd323316eb34c69e0748c9451986f5adf3e SHA-256: 5a9c6ba8b8476ea67aef5671f6293c415b8fe4f33c1c2056433e00c2eee29243
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The embedded URLs and the heuristic findings indicate that the primary purpose is to redirect users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/123?utm_term=mind+control+pdf PDF link annotation
    • https://jelopujepifo.weebly.com/uploads/1/3/4/3/134341958/5414411.pdfIn PDF document text
    • https://selamosufuk.weebly.com/uploads/1/3/4/4/134463567/luzokajiwunirelor.pdfIn PDF document text
    • http://gemobaraza.iblogger.org/beiler_s_donuts_nutrition_information.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/PEn5haT/sort_it_3d_level_11.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/ggggLhf/snapper_fish_taco_sauce.pdfIn PDF document text
    • https://zogeliwev.weebly.com/uploads/1/3/4/3/134353139/todadirop_jebedokawel_tonimosulo_lebawiligap.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/gFibwih/train_to_gensan_unlimited_money_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/fjijcgc/wumixetuxol.pdfIn PDF document text
    • https://cdn.sqhk.co/wivenute/fhigdm2/beatevo_yg_treasure.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/63da9ba03bc.pdfIn PDF document text
    • https://cdn.sqhk.co/nijazulagoza/T7jbijT/41799563124.pdfIn PDF document text
    • https://rewajugelawuz.weebly.com/uploads/1/3/0/7/130738764/buxevewotaw.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/ghglZgd/cannonball_run_3_movie.pdfIn PDF document text
    • https://site-1178471.mozfiles.com/files/1178471/fsk_modulation_and_demodulation_waveforms.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/hc8ibjd/papavegaxut.pdfIn PDF document text
    • http://dibowofu.22web.org/65485100130.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/podawakumepewez/95414635450.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/gogulojasejetetepulanariz.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_off0000d9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F0 4768 bytes
SHA-256: e9e3643177932df54beb42c1c2e047ac5e9c6a5963c6a008f06776eb3e2170ae
font_01_sfnt_off0000ea42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA42 10236 bytes
SHA-256: 7bc0cd1e5471916d5310fc42c45768742325a97b57e5560c0c0a485d227b8f17

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