Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db581383de0556c…

MALICIOUS

PDF

86.7 KB Created: 2021-03-14 23:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6346b6224ab20d50c38899be512c5f3e SHA-1: 228eba57ea6ccad00df535721c26d74ab716e0a6 SHA-256: 8db581383de0556c067d1df5f82d0e2f5e823c542977cac48a5050461159ea40
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for credential harvesting or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a phishing or content-scraping attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://xezojetit.ru/strik?utm_term=hoover+max+extract+77+not+spraying+water PDF link annotation
    • https://cdn.sqhk.co/ronelejibir/RjMchf0/origami_flower_bouquet_youtube.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/a_view_from_the_bridge_free.pdfIn PDF document text
    • https://cdn.sqhk.co/someteku/jdhioib/big_rig_truck_and_trailer_sales_greer_sc.pdfIn PDF document text
    • http://pshcomonhere.xyz/mujeres_que_corren_con_lobosd1tvk.pdfIn PDF document text
    • http://bonus332.site/milady_chapter_20_answersy1jr6.pdfIn PDF document text
    • http://teachersaid.fun/kogepolunzyl.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/99865251935.pdfIn PDF document text
    • https://cdn.sqhk.co/bikulatitaxe/ibo3Xia/basecamp_project_management_tutorial.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/1718200086.pdfIn PDF document text
    • http://itwow.info/zomudasemixemxrr43.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/jepes.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/iifgcqK/bowling_tournament_2020_free_3d_bowling_games.pdfIn PDF document text
    • http://ketousa.site/sojiraxuzirobekiwibalafdbjio.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/81103397301.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_add54bbac6454ed69713f8fc8090c338.pdf?index=trueIn PDF document text
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_68a4f4c33d854be78a93db2114041a8c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/noun_phrases_homework_year_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/instagram_video_er_without_url.pdfIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_5d69adc7b249444eb83441cc1d4d0bd1.pdf?index=trueIn PDF document text
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_eca06003b0d143d9a425886c55028779.pdf?index=trueIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_0d995d997449467d83e6b83cd384d35e.pdf?index=trueIn PDF document text
    • https://16cc4848-9a85-487f-bc1d-da55f68f8448.filesusr.com/ugd/dcf86b_88405434807f47bba012a911b673bd88.pdf?index=trueIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_8672236353954a2c9139c6e12fc8617d.pdf?index=trueIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_8e9d31f4cbc84c27ac617abaa72d05fd.pdf?index=trueIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_95dc486b733644f8a781a734dc3de96a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/blackbird_chords_and_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/film_frozen_2_2019_sub_indo.pdfIn PDF document text
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_10e9a64873ba4922ac5d18d424e31cf4.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD0 5584 bytes
SHA-256: 06ae8fadbf4153def18dcad8dce5e281927e4573001df69339fe5dded5fec437
font_01_sfnt_off000110d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D8 10588 bytes
SHA-256: 66c505e7ece22dab630c61448d3ab1e6043212befc099244e36dac25a272e55e
font_02_sfnt_off00013564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13564 16196 bytes
SHA-256: 536551dee6876366cf8a5d925709f0aaa9c9f58e9963f4e154d0e8cf77de6ee3

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