Malicious PDF — malware analysis report

Static analysis result for SHA-256 a832bf600f542d49…

MALICIOUS

PDF

73.1 KB Created: 2021-02-24 13:27:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 59cb511555e79741e7cea230c4ddbd53 SHA-1: 51d5a17cbcd2eb3abe405d7eb7fe86e57d28ef0f SHA-256: a832bf600f542d4924aca0f9ce33ad2bc3a707fae55fa5fea160f42edbd45528
214 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 a machine learning model, indicating it likely serves a malicious purpose. It contains numerous embedded URLs, including a critical finding of a redirector link to 'crophysi.ru' and a link farm pointing to 'lg-supportteam.com', suggesting an attempt to direct users to potentially harmful websites. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

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 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.
  • 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/wb?keyword=who%20did%20sookie%20stackhouse%20marry In PDF document text
    • http://lg-supportteam.com/poweredge_r440_rack_server_datasheetti55e.pdfIn PDF document text
    • https://cdn.sqhk.co/pimabosi/eifiezh/6135450143.pdfIn PDF document text
    • http://itchia.space/nitenbt2hy.pdfIn PDF document text
    • https://vawuwoteb.weebly.com/uploads/1/3/0/9/130969488/lejajo-kekatari-vobafedamu-wevewesili.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/vudisenopanelobu.pdfIn PDF document text
    • http://huaweistoreukr.xyz/kugasamotedevixuvawamefufqzy2e.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/watevd9tqu.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/a281aKx/78122731565.pdfIn PDF document text
    • https://bunutawopuzo.weebly.com/uploads/1/3/4/8/134868528/rezuzodasagona-lafemax-zekinakujoga.pdfIn PDF document text
    • http://csxmoney.info/suxijojasype0.pdfIn PDF document text
    • http://iqecoportal.ru/blender_tutorial_character0ly00.pdfIn PDF document text
    • http://klyshsheff.xyz/jim_kwik_memory_techniquesigpg0.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/wixanarer/botanical_names_of_flowers_with_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/bittorrent_pro_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/jitawekizivetipupat.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/60186277155.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_off0000e1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D1 5324 bytes
SHA-256: 9b56dcb9683f1617ba0f578c8b6373e3f5e1560eb465135c50977fac4d21d748
font_01_sfnt_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 10452 bytes
SHA-256: 2aa77d87bc8571279ccf7f3aeb50d803d1830403d6ed0ffb2059f3dc351c9c70

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