Malicious PDF — malware analysis report

Static analysis result for SHA-256 68bb05a7eee424fb…

MALICIOUS

PDF

75.1 KB Created: 2021-04-02 00:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 373910e0f63aba586d61b0b80a08175d SHA-1: 2df80cecb51301469d9bfa12362c6690f03c8884 SHA-256: 68bb05a7eee424fb6b7004cf0a83f69f3dc9018ef9342af591af1dbc75d74189
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=bosch+1617evspk+router+combo+package PDF link annotation
    • https://cdn.sqhk.co/xivovido/KfDRjdo/43103483166.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/VHcyGNj/assassin_s_creed_valhalla_gameplay_4k.pdfIn PDF document text
    • https://cdn.sqhk.co/demejapad/ichiaha/here_go_hell_come_bl3.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/jgjjZYo/dreamer_movie_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/UdWicwc/wadabinupazavudalebujip.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/hjaBjg0/4054086059.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/jeijics/lovely_pets_grooming_salon_2.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/jjaiijf/satonapisapalivirejeni.pdfIn PDF document text
    • https://cdn.sqhk.co/warugariluxe/ijggm1D/cruise_lines_from_nyc_to_hawaii.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/hhihhcz/volorol.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/hhiiPjj/jackpot_thefatrat_piano_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/roweziwamu/dvKMRjd/19587899788.pdfIn PDF document text
    • https://cdn.sqhk.co/matijamaj/itbzfge/25986661801.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/abjdV1m/bosagigakuwojufudemojo.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/bba8e47f-623e-4fd2-a8c0-4fdac5977bc0/46932333530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ea252e-1271-4a84-bfa2-42d5dba6f22f/software_developer_resume_sample_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d10860-7b39-4cd8-bf7f-dd7dffcc888a/rewetegerixupi.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/table_css_template_html.pdfIn PDF document text
    • http://tasopawak.rf.gd/10998902072.pdfIn PDF document text
    • http://worifazitinel.rf.gd/bleak_house_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/21075000704.pdfIn PDF document text
    • http://xuxusemo.epizy.com/lezuziniwuzamaf.pdfIn PDF document text
    • http://tujolelulovowew.rf.gd/wikizafaju.pdfIn PDF document text
    • http://kediditu.rf.gd/99277184915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c30424-de20-4463-b5d5-e2c6bd221748/radiwow.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_off0000e20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20D 5916 bytes
SHA-256: 2db08805cc240db520671de81ee2b34522cab026a059d5f6902836ec4ac5e40f
font_01_sfnt_off0000f616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF616 11648 bytes
SHA-256: 670763fa50e16d2ab168e14da27aa1e366a1c8e72899dc213e3fdbea87872d7f

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