Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca7b6c3c0cea284…

MALICIOUS

PDF

78.4 KB Created: 2021-02-28 06:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c30c22a954c29210c5ede5e052626596 SHA-1: 224e68bd82fb0c55a46faa0eb9fb88251b819b0a SHA-256: 7ca7b6c3c0cea2844357bd6f62ca640e0e0f5dce4e5c3293eaee30c1eb727e1f
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to a domain associated with phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a specific search query, suggesting a phishing or content-luring attack pattern.

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://midufefew.ru/award?keyword=2012+jeep+grand+cherokee+overland+electrical+problems PDF link annotation
    • http://prodit.space/wrong_turn_movie_5gt2yp.pdfIn PDF document text
    • http://chelamela.org/punjab_college_admission_form_2019ilqjq.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/jwbWOha/learn_to_play_piano_instantly_youtube.pdfIn PDF document text
    • http://remontvorot24.com/android_bluetooth_auto_connect_source_coderxgvh.pdfIn PDF document text
    • http://fastgetme.online/20462422337b5nfu.pdfIn PDF document text
    • http://koreanluxe.com/actualiser_une_formule_excelkh4qc.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/NgcrvvJ/leadership_skills_in_nursing_nhs.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/gdiajbf/nuzugupajofebegesijufoxum.pdfIn PDF document text
    • http://bebodepana.22web.org/free_victorian_cursive_handwriting_sheets.pdfIn PDF document text
    • http://luzikudejijes.22web.org/xuwozivibimizasi.pdfIn PDF document text
    • https://cdn.sqhk.co/fufowomusixi/voViijh/44512930428.pdfIn PDF document text
    • http://maska-respirator.shop/railroads_end_of_open_range09wfd.pdfIn PDF document text
    • http://madusotiju.22web.org/golds_gym_stationary_bike_210_u.pdfIn PDF document text
    • http://upgrade4me.com/cuisinart_burr_grinder1dvby.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jipesofu.rf.gd/how_many_calories_in_a_large_reeses_sonic_blast.pdfIn PDF document text
    • http://tirujukixiw.epizy.com/femenonirokabodizonupe.pdfIn PDF document text
    • http://jisekexebaj.epizy.com/80679949165.pdfIn PDF document text
    • http://tifijawubizomed.epizy.com/which_sodastream_model_is_the_best.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_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 6060 bytes
SHA-256: 14845aa1e754c6374c2f228cf9f677df209212135312230b4b64085e9d3e11b4
font_01_sfnt_off000108c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C3 10184 bytes
SHA-256: ea22b415dda54a2cb8616063e450b97ebb7aa3430578033e11f58ea819ab04b4

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