Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c15337bd45ec77c…

MALICIOUS

PDF

87.1 KB Created: 2021-04-02 11:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5165bda583cd72144c92adf8db8f43a6 SHA-1: 4dfbf5feee4b14e0221356cffe8d610a579068b0 SHA-256: 9c15337bd45ec77c4ddb270b210ee2b567620f41a3a672c9c733dbb2d51f6eb8
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to sites hosting malware or engaging in credential harvesting. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/award?keyword=awg+table+pdf PDF link annotation
    • http://kovuzaxaf.medianewsonline.com/jegofitemijarijizenavinox.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/9c6d2937.pdfIn PDF document text
    • http://matras-24.ru/99148405495s8vaf.pdfIn PDF document text
    • https://lifibopunikesi.weebly.com/uploads/1/3/3/9/133999807/guxanijomore.pdfIn PDF document text
    • https://cdn.sqhk.co/mobapesemano/8gerLgj/zagomufulozukugebipi.pdfIn PDF document text
    • https://vuzufakafedovi.weebly.com/uploads/1/3/5/3/135347170/nujoz.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/pibituzefebuxadedu.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/43333612418.pdfIn PDF document text
    • http://milansit.space/what_is_the_best_interior_design_school_in_londonm5pk5.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/abramelin_ritual.pdfIn PDF document text
    • http://shopwithsale.website/792379731774fs2o.pdfIn PDF document text
    • http://fulukegoror.getenjoyment.net/para_aprender_a_leer.pdfIn PDF document text
    • https://jukudedavat.weebly.com/uploads/1/3/0/9/130969580/bece43.pdfIn PDF document text
    • https://cdn.sqhk.co/palubavuz/eheqrha/75391217216.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/bgKGOhg/68482122045.pdfIn PDF document text
    • http://hookup757.fun/34318601134lv9cs.pdfIn PDF document text
    • http://shortsomfj.space/assembly_line_invention_date6s8xs.pdfIn PDF document text
    • https://sisuwupuwadigif.weebly.com/uploads/1/3/1/4/131437471/bd4f5ef5cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wozimape.onlinewebshop.net/how_to_lift_more_weight_on_bench_press_fast.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/circulatory_system_diagram.pdfIn PDF document text
    • http://vapewokadovusa.myartsonline.com/rezezelewunowumesokazaje.pdfIn PDF document text
    • http://guriseb.myartsonline.com/aptitude_test_preparation_book.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_off0000fea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA5 5156 bytes
SHA-256: 14632e53df5cecc3e9145af00577665c36c1c3255c6d7a0f1b33cfb05d53a7c4
font_01_sfnt_off00011061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11061 12396 bytes
SHA-256: 12b09b25db06c45d1cb900a47b883538d3938961a1b72fccadcf83673bc6dbbd
font_02_sfnt_off00013b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B14 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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