Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d52d920ee928d0…

MALICIOUS

PDF

92.5 KB Created: 2021-03-17 09:19:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e0eda71f7b9b8da3e281078fa48c139e SHA-1: e0730edc02413ed37c32d0b261c0994314c5dae1 SHA-256: 80d52d920ee928d0feaf21b2bfb8fe1e6a351abd841306bd70448acca902becb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with the primary URL pointing to a suspicious domain. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://gimoguvi.ru/123?utm_term=brazil+vs+germany+2002+formation PDF link annotation
    • http://tophomework.space/blanch_condensed_light_font_freek4sfn.pdfIn PDF document text
    • http://bupatinewesep.66ghz.com/24838248234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426269/normal_6017ab9b9a923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417830/normal_600a02e210148.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424011/normal_5fe3af0d658d8.pdfIn PDF document text
    • http://opssmall.space/6214966864002pde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kelopemajidimux.epizy.com/delonghi_oil_heater_timer_instructions.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_52fc00ba29204ab9a298dfc9375db532.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/nouer_foulard_hermes.pdfIn PDF document text
    • http://vatapusaf.rf.gd/email_google_form_responses.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_bf3853e895c943548472df5f3361c019.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/gizipisunekutimalolu.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/23039158226.pdfIn PDF document text
    • http://xemubekimivimed.epizy.com/baxabexunelo.pdfIn PDF document text
    • http://dabinonasibu.epizy.com/adobe_creator_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/51526913114.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/autocad_2016_free_filehippo.pdfIn PDF document text
    • http://jimibidubarabus.epizy.com/wezurofo.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_off000129d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D2 5624 bytes
SHA-256: 1aababf5f1f94b2a9a53c0b41cfa0e2a20ce624778b066b13009643026ef8bc5
font_01_sfnt_off00013cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF7 11988 bytes
SHA-256: ea88ee5b049a0128bf64a2bf55a97a7aab2ed57972f65e01534f114396bf6b3a

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