Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cfe4d63aa7039b…

MALICIOUS

PDF

91.4 KB Created: 2021-05-12 18:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4e496e443ceb20fff3e5527f3bb5f61c SHA-1: 202cf42fd5157c9ec979f83ba84198da26fef611 SHA-256: 94cfe4d63aa7039b832caf91a4d270c211b0cb8645bf909f42309cd8c995d975
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious or SEO-spam related domains, including one specifically mentioning 'airport_city_hack_ios.pdf'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is used to host a link farm.

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 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.
  • 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://dafemum.ru/strik?utm_term=hunchback+of+notre+dame+musical+someday In PDF document text
    • https://cdn.sqhk.co/vokalater/gxjhFjh/airport_city_hack_ios.pdfIn PDF document text
    • https://jijajaxasivezix.weebly.com/uploads/1/3/4/5/134588510/046957c700ad125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475580/normal_606e8dff44a31.pdfIn PDF document text
    • https://nifiwaratobiwe.weebly.com/uploads/1/3/5/3/135346776/fevubutupusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_6056e17d10845.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/32701b0fbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_604cd2d2675e7.pdfIn PDF document text
    • https://ganubidorebe.weebly.com/uploads/1/3/2/7/132740923/55d7dda522f.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/bTugdia/gofagozuz.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/crP8LBu/grim_reaper_pepper_scoville.pdfIn PDF document text
    • http://muvibigi.22web.org/calendar_app_android_open_source.pdfIn PDF document text
    • http://kojewotezigu.iblogger.org/bolenekita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495392/normal_602c0c95a15ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484126/normal_603a4bc243444.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475741/normal_5feb805456046.pdfIn PDF document text
    • https://zuwadakake.weebly.com/uploads/1/3/4/6/134664894/lenomow_zopesuvawemudog_jifitisudakapax_mumokifuja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/parrot_ck3100_lcd_bluetooth_handsfree_car_kit_black.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/fraction_addition_subtraction_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/how_to_put_out_a_red_cross_message.pdfIn PDF document text
    • http://xawosote.epizy.com/26364033689.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/website_layout_psd_files_free.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/google_data_studio_conditional_formatting.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_off0000e21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21D 25156 bytes
SHA-256: 63348e5b81ad1b819f256d247e58f3c9a959f9064755b950dbe4547c17de243e
font_01_sfnt_off000129ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FF 5528 bytes
SHA-256: a1d6f55af849d2e0ea02e32fec84c442deb3571dafef2c9b1c8ee0985f2a6537
font_02_sfnt_off00013ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA9 10328 bytes
SHA-256: 6421d4a84f4b879447d471b062e617931af80b17238f44a7ee5b821442e337d3

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