Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aff4d322cc5942c…

MALICIOUS

PDF

78.2 KB Created: 2021-09-14 10:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 8c004cc261b4df1952d9ec3396095e2d SHA-1: 70a9e5091bbe773b735b0d84efbbbcb3dd8508a2 SHA-256: 1aff4d322cc5942c9c1204ff1da015ebc2686771ee9b79fdb959a55db322af10
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=ldplayer+windows+7+32+bit PDF link annotation
    • http://etabetasurvey.com/userfiles/files/80268723346.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/fozevufoke.pdfIn PDF document text
    • https://maria-galland.ru/files/file/pinemerejetepitev.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/60603886017.pdfIn PDF document text
    • https://togelunited4d.com/contents/files/97853269974.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/34587578508.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/64478693140.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/vinulotofitoj.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109040617471461.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/labebovibunabisufebujisip.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/xerajenolujodumikokukuk.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/nerosokimiwotamuforix.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/12583990766.pdfIn PDF document text
    • https://totspotdaynursery.co.uk/ckfinder/userfiles/files/38603689673.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/93419379132.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/relesomewazebex.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/zutafepidopibidixadojalu.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/jewarinemasiv.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/pokoderude.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/disixevotarozosaxep.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/retuluduxonakumuzejat.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-09-07/535d0d7b43ff143ab44689ffd026559e.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613622ed63b28---pinebiwetopim.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB53 11024 bytes
SHA-256: 17daf423b5c6a733f79379d56f53af3799e3e78e48aed326a2719eca4672533c
font_01_sfnt_off0000e508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE508 17984 bytes
SHA-256: 64d9dafcae862b6ab1bcf56235422fc2c12c9bd9e6b577128ae982ce0d6841a4
font_02_sfnt_off00011383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11383 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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