Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd400ad4965382c7…

MALICIOUS

PDF

77.0 KB Created: 2021-09-15 16:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a2393871f9e9bd6ddc8243a832e2c9b4 SHA-1: b328c846f171e2156a528e7dfa0cffc2fef502b2 SHA-256: bd400ad4965382c7987b238f5a6e72edd24e6f65df48e5721a80230799d4af1b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many pointing to disposable hosting and structured as a link farm, suggests a phishing or malware distribution scheme. The 'utm_term' parameter in one of the URLs indicates a tracking mechanism, further supporting the lure of potentially unwanted applications or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 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.
  • 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://chcial.ru/uplcv?utm_term=tom+gold+run+mod+apk+happymod PDF link annotation
    • http://technestudio.eu/userfiles/files/5973026051.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/28825983101.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/zonomifiletotomuworu.pdfIn PDF document text
    • http://www.s4b.nl/upload/files/27703028033.pdfIn PDF document text
    • http://likuidart.com/files/ckeditor/files/13702680270.pdfIn PDF document text
    • http://dsagco.com/Upload/file/94005742444.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/71996035390.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/wunukaruxajemasovux.pdfIn PDF document text
    • https://izr.fr/files/xupetusobimekaxibu.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/31970852187.pdfIn PDF document text
    • https://lp-tracking.com/userfiles/file/9012415391.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/fikuni.pdfIn PDF document text
    • http://zzquansu.cn/d/files/99604032348.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a42589ca0---jirisapi.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/marumizigigu.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/38204647774.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/tufifoko.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/76685796949.pdfIn PDF document text
    • http://www.hausman.eu/images/wyswig_images/file/40657134220.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210910134316.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/lirabisupugabomotuxekili.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/49fa40b3087c433f25e738fcd71e9e83/80865592696.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC686 10620 bytes
SHA-256: 77d15a2f25407a8be3ea86f368b5abe099b6bafdc3ea28f4ad358895c4045ce2
font_01_sfnt_off0000de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE58 18928 bytes
SHA-256: 110cf77d4872a08cc4c26d0f1e9ba2067e3a12be34a7474a78e9837336367b5f
font_02_sfnt_off00010e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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