Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b7362689052e52…

MALICIOUS

PDF

65.7 KB Created: 2020-11-17 01:32:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0172ccb28f63db58c0c5fa6b11ac3e94 SHA-1: a198255327e3ac1b5ea9be16017f0f776241aa2c SHA-256: b0b7362689052e52b2e809d4bd72f9ac09531673294225ee44c5b17d03d102e9
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on weebly.com, suggesting a link farm or redirection scheme. The presence of external URIs and the high ML score indicate a strong likelihood of malicious intent, possibly to redirect users to phishing sites or download further malware.

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://trafffi.ru/123?utm_term=entrepreneurship+kirzner+schumpeter PDF link annotation
    • https://gumelajijepepa.weebly.com/uploads/1/3/4/6/134639918/gakokeruw.pdfIn PDF document text
    • https://gokewulifas.weebly.com/uploads/1/3/4/5/134599519/31e7f.pdfIn PDF document text
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/934078.pdfIn PDF document text
    • https://dujenavu.weebly.com/uploads/1/3/4/3/134366251/rowukuweluzagusew.pdfIn PDF document text
    • https://gixawixo.weebly.com/uploads/1/3/4/3/134322292/4051792.pdfIn PDF document text
    • https://retagavit.weebly.com/uploads/1/3/4/3/134363188/5126698.pdfIn PDF document text
    • https://zisikokemebekus.weebly.com/uploads/1/3/4/2/134235681/zuleko_romujeraniku.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/henghuili-files/61333181048.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/autobiography_of_a_yogi_free_download_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/ranefilupizedunipe.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/89437828768.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/provisional_diagnosis_in_dsm-5.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/kasatelekixivo.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_off0000ca04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA04 5004 bytes
SHA-256: 69116071555116d1df58bf6907831c4c6eaac8dffeac8d7816b51e608c4ca7d8
font_01_sfnt_off0000daec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEC 8976 bytes
SHA-256: 3683a2ea02a9d98c3951bdd3dec62daca5eddc2e1db7558bef268923abd2f984

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