Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce61390cf05bfa85…

MALICIOUS

PDF

87.2 KB Created: 2021-09-14 04:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59d30e946518e24e747d4762144c9bec SHA-1: b078930fe9f9d548ecaa71cbd0bb41427ab79a3c SHA-256: ce61390cf05bfa85d1c92c3d849a3c7fa9a49f6c9543853f71b8cbc4f4828608
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as a link farm, with many links pointing to other PDF files. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into believing they will receive a prize or funds, which is a common advance-fee scam. The embedded JavaScript likely facilitates the redirection or download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • 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 http://kashima.cc/userfiles/file/27589523315.pdf
    • https://diedacorporation.net/freesiafiles/file/lisimigomep.pdf
    • https://nieruchomoscikomercyjne.co/files/file/13355965496.pdf
    • https://raljob.com/userfiles/file/73221829519.pdf
    • http://bolt-go77.com/fckeditor/userfiles/file/tizeralanutesanufale.pdf
    • http://wamaeassociates.com/images/uploads/originals/file/vutukekelusukivekibu.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161384ba6aece7---furuselivi.pdf
    • https://rajakeempat.com/contents/files/sutoxeritisamerapudotab.pdf
    • https://chief-moving.com/editor_upload/file/jetegovajo.pdf
    • http://www.americaninvest.net/upls/files/vumutesitukezalegir.pdf
    • http://german-ex.com/images/blog/file/91843661680.pdf
    • http://yuanhebiotech.com/upload/files/11900220859.pdf
    • http://szerecsen.hu/editor_up/legudazi.pdf
    • http://dent-pro.cz/pic/file/62525935048.pdf
    • https://gsacademy.ge/uploads/files/jujabisifasekufonikano.pdf
    • http://dxczx.com/ckfinder/userfiles/files/20210912_050619.pdf
    • https://greenlandpark.com/uploads/files/munexomulorenomefupufofe.pdf
    • https://yarpaket.ru/userfiles/file/59996642674.pdf
    • https://rougezenekar.hu/files/file/11272156019.pdf
    • http://sns-russia.ru/userfiles/file/33002847814.pdf
    • http://dtyxbpzx.com/filespath/files/20210907134717.pdf
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/61589183425.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357a7c375c1---81502811854.pdf
    • http://orchid-daikanyama.com/userfiles/file/zekuxulofugujipivep.pdf
    • http://tykhchem.com/upload/files/8731710469.pdf
    • http://najlepsietorty.sk/uploads/fck/file/14367657684.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=use+android+phone+camera+on+pc
    • 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_off0000f075.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF075 16792 bytes
font_01_sfnt_off0001088c.bin
5035ff80c6b094198ac6ba3b2d86a80ea327dd80940a3f6b16f68dcac5a3d404		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1088C 10640 bytes
font_02_sfnt_off0001209f.bin
0f653819e8177fcdddcd7b78157110941ef8c792e3e87da188085ee831ccb8a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1209F 18076 bytes

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