Malicious PDF — malware analysis report

Static analysis result for SHA-256 c008c049a1b7d1ec…

MALICIOUS

PDF

75.4 KB Created: 2021-03-22 08:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fe230453aed59f8d1908d41fa6abfe08 SHA-1: 61a7b9bb646bb30f9dd815b15e20b09b72bc8a43 SHA-256: c008c049a1b7d1ec74207d41141303901b8f34714b22a8ba6b968c82692ba251
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating that some point to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'link belt cranes parts', suggesting a lure. The presence of many links on disposable hosting and the ML classifier's high confidence score further support a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=link+belt+cranes+parts In PDF document text
    • http://kulanefimolon.mypressonline.com/book_meditations_by_marcus_aurelius.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495997/normal_5fdf16c1a1aec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490920/normal_6036f6a4bcf60.pdfIn PDF document text
    • http://auto-fishing-rods1.club/tournament_of_kings_las_vegas_discount_ticketsd57ve.pdfIn PDF document text
    • http://tofogabe.iblogger.org/rivovolab.pdfIn PDF document text
    • http://mavafesumej.medianewsonline.com/8379324816.pdfIn PDF document text
    • http://idealicacolumbia.site/27769995664a1xw5.pdfIn PDF document text
    • http://znalomstvavip.site/verizon_ellipsis_8_tablet_price65l02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414498/normal_602f34433ec68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_8fd915dd111048de93661bc8f82e7963.pdf?index=trueIn PDF document text
    • http://pikaderobiw.atwebpages.com/phone_number_in_moultrie_georgia.pdfIn PDF document text
    • http://detekoxinusogux.epizy.com/guides_canins_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/tofuxuzaxi.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_4c86feb248bf4c7fa4b0efd455395a38.pdf?index=trueIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/zexisukasuxe.pdfIn PDF document text
    • https://1580f21e-fc75-4350-9669-3be8b7525729.filesusr.com/ugd/eff6cf_3eaf64394b054024904327b14dea5289.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/6376619565.pdfIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_f160d80cd38b40f2b91f242c26642650.pdf?index=trueIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/how_long_cook_burgers_on_george_foreman_grill.pdfIn PDF document text
    • http://ziwitiko.epizy.com/lukelumu.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_off0000ea92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA92 5072 bytes
SHA-256: 5b04df060736d0fb67befd62930729c9e7dc6f5f3d3a94055110fd75a096939e
font_01_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 10736 bytes
SHA-256: 390bea2094bcdbed57fa2743b802361ba65e4c81c3333116eeca58236d4233a4

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