Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0eab8d4c88429e…

MALICIOUS

PDF

70.4 KB Created: 2021-04-03 21:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb56064c812a9b363780dd68255d548d SHA-1: 9a99f6f086f27ad3a5782c1638337de4d53b8018 SHA-256: 8e0eab8d4c88429ea13feeeb39b73d1cf5d716c9ecb0ac6fec8fe4cb355a1d16
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing lure. ClamAV detected this file as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious. The embedded URLs suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/wix?keyword=cambria+county+pa+recorder+of+deeds+fees
    • http://wiinorama.website/us_history_chapter_19_section_3_answersg4mh2.pdf
    • http://bufo.online/re-_admission_form_of_ignou_bdphvkwm.pdf
    • https://cdn.sqhk.co/nufomewo/j0Whihc/outbreak_definition_science.pdf
    • https://cdn.sqhk.co/rodofusavivi/tOifgjb/rajiv_nagar_sector_14_gurgaon_pin_code.pdf
    • https://cdn.sqhk.co/medujebukoma/ijgiOij/dynamix_music_promotional_code.pdf
    • https://cdn.sqhk.co/romilononove/mhcCgj4/rogexozasenulim.pdf
    • http://xivazokib.medianewsonline.com/change_to_word_adobe.pdf
    • http://zatoboyvibor.fun/chinny_baby_video_by_flavourwepql.pdf
    • http://bijepitujutix.sportsontheweb.net/evh_5150_iii_50w_el34_review.pdf
    • https://cdn.sqhk.co/zubavagi/5UnDYB3/rode_mic_pro_plus_settings.pdf
    • http://ranking-se.com/standoff_meaning_in_urdu_easykn5ew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_3ed4085ab2e34bd0af1b525b10b763a9.pdf?index=true
    • https://54fa3baf-6954-44a2-98df-2137f0cc340f.filesusr.com/ugd/14b79e_7c94d18dc8e246888df3d6756605cf62.pdf?index=true
    • https://s3.amazonaws.com/mozedijiz/9577642992.pdf
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_ca20caa065c441648c02837fed279c80.pdf?index=true
    • http://fepetixapokurob.myartsonline.com/advaita_bodha_deepika_tamil.pdf
    • https://s3.amazonaws.com/sugosubexez/nimam.pdf
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_f157b08e7d4f475d813d180b0cd0d004.pdf?index=true
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_addf211736ad4042a3fa678df453e5ef.pdf?index=true
    • http://lawewil.atwebpages.com/how_to_create_a_lean_canvas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d35c.bin
140938248d5f1d6e2f5896c029bf4585654a5e938d096b120fa4515e7e2362c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD35C 5416 bytes
font_01_sfnt_off0000e5b1.bin
00cc4dd45f62a3635660f9622cb34c50266f3022046d83d1693da98960788298		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B1 10680 bytes

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