Malicious PDF — malware analysis report

Static analysis result for SHA-256 386b7e370549d723…

MALICIOUS

PDF

78.7 KB Created: 2021-05-12 03:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 250c4d2db235f2f0bfe1f3dacdf08698 SHA-1: 80d7ff41ab0b35578880ad0be22fb7d636f32db6 SHA-256: 386b7e370549d723543cd1acaf57919f56bb7b4af8143b5a766263b60c666f75
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely leveraging T1566.001 (Spearphishing Attachment) as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://bologen.ru/strik?utm_term=hp+laserjet+1320+printer+price+in+bangladesh PDF link annotation
    • http://sokegex.mywebcommunity.org/26171123754.pdfIn PDF document text
    • http://ritegifufefut.scienceontheweb.net/sazufegewizavupud.pdfIn PDF document text
    • http://miribut.mywebcommunity.org/logitech_z_5500_price_in_pakistan.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/tcp_ip_stack_repair.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_605ddb7828d42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_601ecf93e42c1.pdfIn PDF document text
    • http://xovitixekewelom.scienceontheweb.net/ideology_and_ideological_state_apparatuses_essay.pdfIn PDF document text
    • https://tozupetap.weebly.com/uploads/1/3/1/3/131383790/tizej.pdfIn PDF document text
    • http://rimarilomikozu.medianewsonline.com/leadership_style_assessment_tools.pdfIn PDF document text
    • http://pifovabu.getenjoyment.net/lafixenuv.pdfIn PDF document text
    • https://geruzusuvar.weebly.com/uploads/1/3/0/7/130776720/guromujomuwesugena.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/metubevozisul/2011_chevy_malibu_maintenance_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/64098759206.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/duguvebanasiwasabumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1adbf2b-237a-47cb-9abe-5ff38c0b845a/gekosaxilojasif.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/brand_guidelines_indesign_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/biblia_de_estudio_dios_habla_hoy_para_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f6cf46-91cb-4e65-b35b-db704cc57728/north_carolina_dmv_traffic_signs_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66c2ba78-08b9-4887-8e38-666a14659f26/motorola_n136_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bcfffd7-9fdb-4de2-9b67-0da0e75e0e3f/zagek.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_off0000f3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 6000 bytes
SHA-256: f97252b7d902db9b8b366adc432c680ec3b6f950a72e5c06a6bb3294373c7b6d
font_01_sfnt_off00010841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10841 10944 bytes
SHA-256: c4f0149113064ae9db739158e54384d28d3dde7c81389938976b27470c1e303d

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