Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e796122f0b0b63…

MALICIOUS

PDF

86.2 KB Created: 2021-03-27 17:12:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 691db231b9b1a3e6532ab8634cbb7059 SHA-1: b17070695e75d4e8a2b0807ea3cb64a80bf6f943 SHA-256: f9e796122f0b0b63ff8bc4476a2d9427bf6990287eb769775de571ad3ce766a1
192 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains embedded links that point to known malicious redirector infrastructure, specifically 'https://crophysi.ru/strik?utm_term=how+to+record+fob+shipping+point'. The document body, though heavily obfuscated, suggests a lure related to invoices or payments, aligning with the 'SE_INVOICE_LURE' heuristic. No scripts were extracted, but the presence of malicious links is sufficient evidence for a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://crophysi.ru/strik?utm_term=how+to+record+fob+shipping+point In PDF document text
    • http://zipubezexupoka.mywebcommunity.org/difference_et_repetition_deleuze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445557/normal_5fde92ab7e83b.pdfIn PDF document text
    • http://burutevopu.iblogger.org/ejemplos_de_ecuaciones_de_primer_grado_de_una_variable.pdfIn PDF document text
    • http://jonebosu.mywebcommunity.org/sodium_hypochlorite_uses.pdfIn PDF document text
    • https://fixefukazadutux.weebly.com/uploads/1/3/1/6/131607703/kiwedejikemovu-bonima.pdfIn PDF document text
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/5388618.pdfIn PDF document text
    • http://ontrade.top/vazemitosivusateou6oh.pdfIn PDF document text
    • https://dukuvurijo.weebly.com/uploads/1/3/4/5/134522813/gogaxo.pdfIn PDF document text
    • http://pmaider.com/micro_ornament_and_crime_manualxmgj5.pdfIn PDF document text
    • https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/malojakabanejuwamuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421199/normal_60296e8569d83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448332/normal_60523b3e2ca55.pdfIn PDF document text
    • https://mabelobixos.weebly.com/uploads/1/3/4/6/134621829/d357fa251fcdb4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fudajajekibow.rf.gd/loxokobu.pdfIn PDF document text
    • http://datidogebe.epizy.com/anvisa_brazil_guidelines.pdfIn PDF document text
    • http://galinuv.rf.gd/break_even_point_examples.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/40903000088.pdfIn PDF document text
    • http://xatofobimuxu.rf.gd/lobivifalezifeve.pdfIn PDF document text
    • http://jibimom.myartsonline.com/salimolusujup.pdfIn PDF document text
    • http://bujoginivela.epizy.com/fejagodom.pdfIn PDF document text
    • http://vimiromomekex.epizy.com/ffxiv_drk_rotation_guide.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_off0001130a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130A 5368 bytes
SHA-256: 18ae45c797d156de61073983b22ce98f7b9ea70131c42494639a6fd49e6e5380
font_01_sfnt_off00012559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12559 11204 bytes
SHA-256: 1ba3ccf336632219b34a99871e278105f2f9157230739dae9722a9755ff050f3

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