Malicious PDF — malware analysis report

Static analysis result for SHA-256 36277c5a924dca4f…

MALICIOUS

PDF

74.9 KB Created: 2021-04-07 01:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cdc32fbc47f2ffd3920b9c33777717aa SHA-1: 3e1128b5ef66bcb5662053b194b3c9b702aba123 SHA-256: 36277c5a924dca4fe48afa262a66a5302773d6d7126811229c23d29a50183dcc
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=how+to+program+remote+for+craftsman+1%252F2+hp+garage+door+opener PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474223/normal_600dfe0a4f3a1.pdfIn PDF document text
    • https://sakobapo.weebly.com/uploads/1/3/3/9/133999770/doluguj_sikizuzanemaj_dazinexotamexun.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/nexajijibexotev_mawiror_ragesejexekixo.pdfIn PDF document text
    • http://ravasixojodari.mygamesonline.org/24787357308.pdfIn PDF document text
    • http://flowerport.shop/how_to_study_for_nclex_rn_after_failingj1lxy.pdfIn PDF document text
    • http://tigukifi.getenjoyment.net/13100288132.pdfIn PDF document text
    • https://vufobuvi.weebly.com/uploads/1/3/1/1/131163959/1760628.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/how_to_check_codes_on_harley_sportster.pdfIn PDF document text
    • https://famosufed.weebly.com/uploads/1/3/4/9/134900490/4950342.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/1094298.pdfIn PDF document text
    • http://maxirem.mygamesonline.org/area_of_2d_shapes.pdfIn PDF document text
    • https://pikisavejalanab.weebly.com/uploads/1/3/3/9/133986241/1261517.pdfIn PDF document text
    • https://vipogonegope.weebly.com/uploads/1/3/0/9/130969266/6180773.pdfIn PDF document text
    • http://fb-pageunderreview.com/mefojugukufapr0ug6.pdfIn PDF document text
    • https://lifagixuwemup.weebly.com/uploads/1/3/0/9/130969738/jujava-bijixov-sodowiwenapulas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_6058027b138b0.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/6366279.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wixanarer/alter_session_set_nls_date_format_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/bonds_baby_clothing_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/advanced_financial_accounting_and_reporting_2.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/messenger_lite_jio_phone.pdfIn PDF document text
    • http://xemigososefof.atwebpages.com/case_interviews_cracked_free_download.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_off0000dadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADC 5548 bytes
SHA-256: 200f2089c980e2fd0da3bcc5eafa2eae09bb15dd15e2ceaf5f074d0593a0b849
font_01_sfnt_off0000eda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA8 9836 bytes
SHA-256: edd10f0b3102a8dc7da1f4b8d2e2780583bb3348b11bc9b6533aa262d95862e9
font_02_sfnt_off00010f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e