Malicious PDF — malware analysis report

Static analysis result for SHA-256 10432c4d97b67d85…

MALICIOUS

PDF

85.1 KB Created: 2021-09-18 15:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6bd6c31a8af73c4542adb83c27dbb9b SHA-1: 4fd8d9ae338e35474c31976867b1e0e5941002ba SHA-256: 10432c4d97b67d8581db677e6d4695c6118cd4baf29a6463ca7c6ecdad0dad99
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous external links, many hosted on disposable domains, designed to lead the user to malicious content. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common vector for malicious PDFs to execute further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://philabc.ru/uplcv?utm_term=how+to+break+password+in+android+phone
    • http://55pluscommunityspecialist.com/userfiles/files/befeleku.pdf
    • http://www.bongbansaigon.com/uploads/files/ketajofotepusotele.pdf
    • https://medosojewellery.com/userfiles/files/98299021823.pdf
    • https://jewfri.kr/files/image/files/73518787835.pdf
    • https://www.nickelmarket.co.za/includes/ckfinder/userfiles/files/66932628437.pdf
    • http://color-gateway.com/userfiles/file/68076408626.pdf
    • https://ikansambel.com/contents/files/josofudaga.pdf
    • http://asid.rw/userfiles/file/19276877871.pdf
    • https://ripedesign.com/app/webroot/files/fckeditor/file/51990917350.pdf
    • http://mim2010.ru/userfiles/file/wibexepilumiwelawevetowa.pdf
    • http://tobn56.com/UpFiles/file/botixotopitukizugal.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161405b394b57c---26263376420.pdf
    • https://bepcongnghiepphuchung.vn/userfiles/file/sidobomefapulekuzofuma.pdf
    • http://stmrcstvm.com/userfiles/file/vobelopa.pdf
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/12454057931.pdf
    • http://evolutionchonburi.com/userfiles/files/39808356309.pdf
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/52420705267.pdf
    • http://inciboya.com/resimler/site/files/nefuwavopuketepikuzu.pdf
    • http://np-laser.com/upload_fck/file/2021-9-3/20210903032241929186.pdf
    • http://lejuriste.ru/files/file/gurabun.pdf
    • http://factblogs.com/uploaded_files/userfiles/files/zutatuwanozebix.pdf
    • http://fasson.vip/images/editor/files/55578027948.pdf
    • http://myhomeinparis.com/userfiles/files/ponaruwunerexiximebin.pdf
    • http://retroldn.com/userfiles/file/lelebunumeguvag.pdf
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/fafariduxalosujiwoxula.pdf
    • http://pro.ovh.net/~tribuene/images/banque/file/6698388731.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e818.bin
2519e299ba8ba1245238bec2f4748250f6521e51e1d4dc0614ff791a4a2566e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE818 10752 bytes
font_01_sfnt_off00010091.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 16792 bytes
font_02_sfnt_off000118a3.bin
342869574fa1eaa42330e3340352aaa406682b65d1d50f20b0a846c117a7e909		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118A3 17620 bytes

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