Malicious PDF — malware analysis report

Static analysis result for SHA-256 894a1753fb7f902b…

MALICIOUS

PDF

86.4 KB Created: 2021-04-22 13:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0e52ccc0192a887976b082fb09122b13 SHA-1: 0e4656ac55685250179bf70f236142a5177165d7 SHA-256: 894a1753fb7f902b9b6e0d88230e21b948c52f924bc79c662813517e1c533c50
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL identified by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/strik?utm_term=friction+lab+worksheet+answers PDF link annotation
    • http://jivusibofonefud.mygamesonline.org/tijizofosi.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/wobibosojitien2.pdfIn PDF document text
    • http://prizinsta.online/murodixekizuxiverekwmg8a.pdfIn PDF document text
    • http://gbo.guru/tracfone_lg_k31_rebel7m8eo.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/what_is_1_in_1000_as_a_percentage.pdfIn PDF document text
    • http://yogist.fun/z_score_table_positive_and_negativegxsn9.pdfIn PDF document text
    • http://ylyn.ru/830485879913n105.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4784b74c-a3c0-4c7b-bc10-5d5860a02abb/93545359027.pdfIn PDF document text
    • http://pijasesegixami.epizy.com/what_is_king_henry_died_drinking_chocolate_milk.pdfIn PDF document text
    • http://zapibesug.epizy.com/how_many_driving_test_centres_are_there_in_the_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0f6266-9a66-41cf-8526-f6be26c3801c/taotao_150_scooter_type_powermax_top_speed.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/63825241154.pdfIn PDF document text
    • http://medelomozukomav.epizy.com/fedex_drop_off_box_omaha_ne.pdfIn PDF document text
    • http://vemexomejolu.epizy.com/5889164669.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/bewagegilufusenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/588c9eca-e49e-44cf-9336-348db57bc436/manamivogepafifinufidik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3818e96e-6a61-481f-8952-379523ded7f6/7590292107.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/11565602606.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/nationalism_in_india_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29dbc8ef-44f1-40b1-b714-097bfe8af6a2/numerical_methods_using_matlab_3rd_edition.pdfIn PDF document text
    • http://josesomesube.myartsonline.com/dakadenolonavavubux.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/91021246556.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD64 5700 bytes
SHA-256: 057b96c64b2a2ee2fea95903b46d5227904cb22b3267cd6cf31b25b54e83a47d
font_01_sfnt_off00011133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11133 5136 bytes
SHA-256: bccb03c4d69b18325e4b687d166e4da19fe0413034d5570128361516535f04a3
font_02_sfnt_off000122bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BB 12196 bytes
SHA-256: 60bbf21764c312fc677e1fe10d569281581c3380d3461bb6b8f73c8708792a55

Open this report in the interactive analyzer, or submit your own file for analysis.