Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2788e73405f6102…

MALICIOUS

PDF

101.1 KB Created: 2021-02-17 07:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: bdf40186121d5838b5f5c107d71ec7f2 SHA-1: 5170ac079669d6342579fcdbefabe1afc8fce656 SHA-256: e2788e73405f6102a7f16eff8a009b9b725388b7cc3559dafdad4d785c99d0c3
184 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically `https://yafferge.ru/strik?utm_term=how+to+get+a+gamestop+credit+card`. The document body, though heavily obfuscated, appears to contain text related to financial services, suggesting a phishing or scam attempt. The presence of multiple disposable domains and link farms further supports a malicious intent to distribute harmful content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+get+a+gamestop+credit+card In PDF document text
    • http://stebsmeh.space/applications_informatiques_synonymeakmxe.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/4Ro97iP/ktm_1290_super_adventure_2020_model.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/Bjjkfje/89914996207.pdfIn PDF document text
    • http://jezojarugeboz.22web.org/vsdc_free_video_editor_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/krigugh/sayapatri_smart_app.pdfIn PDF document text
    • http://shtancircul.site/rijedoki25y6l.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/lightning_mcqueen_cake_topper_templatep9y03.pdfIn PDF document text
    • http://mosasekoz.22web.org/46864561987.pdfIn PDF document text
    • http://widokig.iblogger.org/how_many_carbs_taco_bell_cheese_quesadilla.pdfIn PDF document text
    • http://like-store.site/eye_diagram_worksheettuczq.pdfIn PDF document text
    • http://bajemafo.iblogger.org/4809143410.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/ggmHqgd/shaolin_kung_fu_meditation.pdfIn PDF document text
    • https://cdn.sqhk.co/razupojoja/3hi8Amz/cute_funny_puppy_wallpapers.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/47077984798.pdfIn PDF document text
    • http://gadiwovujema.epizy.com/busqueda_de_informacion_en_el_internet.pdfIn PDF document text
    • http://danofawo.rf.gd/67782548223.pdfIn PDF document text
    • http://popuzavefigud.epizy.com/7965878730.pdfIn PDF document text
    • http://jiwigazuvix.rf.gd/vomutulafepuxubonejuze.pdfIn PDF document text
    • http://getetir.epizy.com/archicad_library_objects_free.pdfIn PDF document text
    • http://zefixufedinokas.epizy.com/kijiwovul.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://www.gnu.org/licenses/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011bb3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11BB3 16436 bytes
SHA-256: 343e19a44001b0f5eed26b59d526756f4643bac48448000ebab9cb1def020619
font_00_sfnt_off00010952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10952 5412 bytes
SHA-256: 3cf31e3dadcf9c5e30114d6486ed9503491b2f65238bfb64104ef21f64704a29
font_02_sfnt_off000148a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148A1 11152 bytes
SHA-256: 2e02c28a41e84aa8633fd55016788ced78a5d335cfec99d3350afacbc9c2f733
font_03_sfnt_off00016e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E56 16348 bytes
SHA-256: 50bf9bcf4531f643876cb8121bbb10b4ce9097e025417e1d1cb7f3801953ec5d