Malicious PDF — malware analysis report

Static analysis result for SHA-256 914d5be0eaa5ccb1…

MALICIOUS

PDF

81.1 KB Created: 2021-09-18 01:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 960e7d6a23b70da50f66836321e49630 SHA-1: 149fade9505c0c90a54bf20665eaacc3ce22d00d SHA-256: 914d5be0eaa5ccb1f04cdc2ecfee7d0055bf428bebe3a79f7c59a80cead39b50
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'smidgel.ru', suggesting it functions as a lure to external malicious sites. The PDF structure and the presence of embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://smidgel.ru/uplcv?utm_term=wallpaper+android+one+piece+hd PDF link annotation
    • http://marienoellebermond.com/img/uploaded/file/17316895294.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/rutosisinominikamon.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109160517527897.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/marodexuzanud.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/lisuzizewigajiwimugubeko.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/75425663871.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/22681375165.pdfIn PDF document text
    • https://yensaovinastar.com/media/files/89985854704.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/514023923.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/jijusuvibiju.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/wekogakajigunuzugitufug.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/90041318247.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/galusawibubu.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/45651055433.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/viwotumasijamakijujiru.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8f906241f---fexidu.pdfIn PDF document text
    • http://fpempresa.cen.es/userfiles/files/dixasonugabuvovodetug.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/wizul.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/97278477469.pdfIn PDF document text
    • https://freeunlock.com/uploads/file/58511369368.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/zofimoluju.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-4/20210904022834416820.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/67111741016.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/mawamosuwusovalupo.pdfIn PDF document text
    • http://www.polni.si/Images/files/29680495014.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1630554805.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_off0000db10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB10 10340 bytes
SHA-256: 64789351208925ad0730dd3b5255d43d257201e82fc597180033f31217090f22
font_01_sfnt_off0000f234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF234 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A46 17052 bytes
SHA-256: b2f476617ecdc4883758ec5d7e2a586822208cb8a5df6e7d79fdc5942d054c65

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