Malicious PDF — malware analysis report

Static analysis result for SHA-256 75993679e817c78d…

MALICIOUS

PDF

93.5 KB Created: 2021-03-28 16:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ff251f720097dd4d6615092b952881f2 SHA-1: 1ebffca7db73fdffdc988734869f3873036652a3 SHA-256: 75993679e817c78d08aa07b1bf64e084f31230fda0077038f4eccc92cc7d2d2f
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. It contains an embedded URI pointing to 'https://xezojetit.ru/wix?keyword=mid+module+3+review+answers', which is likely a phishing or malware distribution site. The PDF also acts as a link farm, with numerous links to disposable hosting, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=mid+module+3+review+answers PDF link annotation
    • http://gutibefatidag.medianewsonline.com/punctuation_marks_in_urdu.pdfIn PDF document text
    • http://regikenapedezij.22web.org/86324548115.pdfIn PDF document text
    • http://lezagerodise.iblogger.org/3rd_conditional_conversation_questions.pdfIn PDF document text
    • http://belofakomag.mywebcommunity.org/gojevogaves.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vetalobaxa.rf.gd/46615664677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef8552e7-4fe4-4817-8e17-e7710c4ca9a9/tales_of_a_fourth_grade_nothing_chapter_10_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/putigubulonepifatujarazof.pdfIn PDF document text
    • http://diwukimip.epizy.com/lokerogaladedivazevudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f4fc8d7-521b-4fb3-941a-fe0956527c6b/82343228657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f532cf-882f-4ef3-8f7e-6900f4542410/20181945219.pdfIn PDF document text
    • http://japuxizikaroviv.rf.gd/pan_baidu_er_chrome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28fe8935-eb37-42c0-bf48-8a7c74a768cc/how_to_put_a_phone_on_hold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd54c234-bf81-43df-af1c-90bcb164a973/1999_polaris_xplorer_400_4x4_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30040014-d5a5-4c59-965c-acd7ef706587/rilemibojomadosimuvefak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7836d58-c600-46b1-a9a4-f7300e9333b0/figexenoga.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/nofenifigotojeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af15334-0cb0-48e4-808c-c16186647dec/siemens_hearing_aids_repair.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/76488242090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/197620b7-a8e1-4568-a579-0b6e8bf72f32/how_to_write_a_research_paper_outline_example.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
    • 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_off000117ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BA 5292 bytes
SHA-256: 48a80b935a14a16226fb479fb7f8618ce67e5d7aacce11771e857111685d3994
font_01_sfnt_off000129be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BE 12388 bytes
SHA-256: a1c15bfb11cadf3d366a1ce4fab214c478294316d82cc7dfada10bfbddb13f7b
font_02_sfnt_off000153ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153AD 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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