Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e25762108dcfa1…

MALICIOUS

PDF

210.9 KB Created: 2021-09-12 20:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cfcc430cffafe2fa4047a413924af29a SHA-1: a4863f0d11fb6290e61035662b30cb5a2cab1b77 SHA-256: 87e25762108dcfa11f2612f33b46e6afec612089e7d07d70fea801f67ab1450d
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it is an advance-fee scam lure, likely designed to trick users into paying fees for a fake prize or parcel. Several unknown reputation URLs were extracted, suggesting potential download or redirection points for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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
  • 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.
  • 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://indiantiffin4me.com/nbloom/fckuploads/file/8375835140.pdf
    • https://togelunited4d.com/contents/files/tanepufuvenajigiluz.pdf
    • http://christopherdallo.com/file/safexetejawevele.pdf
    • https://ww150002.linebot.net/upfile/files/20210910121146.pdf
    • http://canphantich.net/Images_upload/files/molizu.pdf
    • http://stefanourso.com/public/userfiles/file/wajagate.pdf
    • http://nakamurasangyou.jp/app/webroot/uploads/files/juseravorebaludujetoso.pdf
    • https://cissud.eu/uploads/ck_editor/files/vitibizunivu.pdf
    • http://ecohort.com/userfiles/files/92532915560.pdf
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/gepasimigipinujew.pdf
    • http://www.egymast-segito.hu/uploaded/fck/file/tebodepegudobalaxew.pdf
    • https://vietrocknet.org/app/webroot/img/files/jukigevi.pdf
    • http://dienlanhlongan.com/upload/files/dutijemolamuguxilazatesid.pdf
    • https://dursunguney.com/userfiles/files/pakarilotave.pdf
    • http://sxcec.org/userfiles/file/41447317419.pdf
    • https://beytarimcilik.com/admin/editor_resim/file/wumoluwavu.pdf
    • https://eliteplacementagency.com/uploads/files/54205049299.pdf
    • http://klpa.net/userData/board/file/niralanelisixiwefufixaju.pdf
    • http://internationalnetworksolutions.net/files/
    • http://sparan-art.ru/ckfinder/userfiles/files/90145201201.pdf
    • http://mishor-uvk.com/uploads/files/ponokubomowuvireloza.pdf
    • http://pngroup.pl/ckfinder/userfiles/files/86954526659.pdf
    • http://potya.com/28569593333.pdf
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/39514070226.pdf
    • https://canoe.ro/Extras/ckfinder/userfiles/files/toratigixipujoxim.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=nouns+starting+with+e
    • 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_off0002dd38.bin
b384b9f7646d8bf0b77b7d9c8109835ea5732b7708435580fc37db7f0a5941d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD38 18784 bytes
font_01_sfnt_off00030d87.bin
c6d526973bb2d3e2c1947f6cd5daf61aba2dbd7e658c6d135684d8f1aba06dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30D87 10504 bytes
font_02_sfnt_off00032586.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32586 16792 bytes

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