Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d269182997e4ac6…

MALICIOUS

PDF

85.9 KB Created: 2021-09-19 05:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 617dc49d561d31ef1eace1103270e776 SHA-1: 504279449171e3c353b59e95490dddb4c7c802de SHA-256: 7d269182997e4ac6f66b9f6361e9a5825aadd9d499a1f7f7b7398113fd64efe8
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it is an advance-fee scam lure, presenting language related to lotteries, prizes, and parcel delivery requirements. The document contains numerous embedded URLs pointing to other PDF files, suggesting a link farm or redirection mechanism to deliver the final malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://mictrogiang.com/userfiles/files/zipitej.pdf
    • http://zussobrance.sk/grafika/dokumenty/pevikufije.pdf
    • https://creteotels.gr/FCKeditor/userimages/file/kasawolux.pdf
    • https://meganimal.pt/site/upload/file/wofuwiruduzizibimike.pdf
    • http://diegogenna.it/userfiles/files/toropeririwosulejavopod.pdf
    • https://tanthueviet.vn/img_data/files/nimofeninavikitapik.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0349f33fc---sisakaruvowijafigigojoreg.pdf
    • http://studioturina.com/userfiles/files/dagimiz.pdf
    • https://akanaymatbaa.com/calisma2/files/uploads/pobetirejipixomut.pdf
    • http://citty.org/images/uploads/file/soxigibutuw.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/051e475e29d8a1e9a14a2430b128bb1e/takorimifalibo.pdf
    • https://capitalsyndic.com/userfiles/file/55828698802.pdf
    • https://inprovitparaguay.com/ckfinder/userfiles/files/44232548087.pdf
    • http://3gr-group-com.gbintl.com/ci/userfiles/files/zeliroxus.pdf
    • https://premium-house.uz/images/file/93763126999.pdf
    • http://huzatfokozo.hu/editor_up/wilutul.pdf
    • http://rracc.com/file_media/file_image/file/betosavafuveziromerofoxo.pdf
    • http://zenithmetals.com/files/94737561089.pdf
    • http://area100impianti.it/userfiles/files/peseba.pdf
    • http://hanasushimenifee.com/uploads/files/85665623612.pdf
    • http://vitcongiong.com/uploads/files/fidemonar.pdf
    • http://bhavalaya.org/ckfinder/userfiles/files/34399272096.pdf
    • http://www.arborvitae.cz/ckfinder/userfiles/files/gazilavonowu.pdf
    • http://techniq.ae/admin/uploadfiles/file/93400972751.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=setting+up+new+android+phone+from+old+phone
    • 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_off0000e9ac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 16792 bytes
font_01_sfnt_off000101be.bin
56d1143e9068d021dcd1937ea49508296cf517eb3429e3a79a6873499e27cccb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101BE 17832 bytes
font_02_sfnt_off00013049.bin
66f7c7676f796f64d35f2598f6d07a03b91b93d2892a577ebdb318977afd5f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13049 11036 bytes

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