Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1b20a68aaf7a8d…

MALICIOUS

PDF

82.0 KB Created: 2021-09-16 07:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6a1e389cf407f739e5a2aeb734189683 SHA-1: 668f62dd36ce97c6ff2dc7a7b8361603ef5409cb SHA-256: fe1b20a68aaf7a8df91fd7fcee50bf11f162e45ba09240dc063637adc5369958
186 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, many of which appear to be part of a link farm designed to obscure the true destination. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent is to trick users into providing sensitive recovery information, such as private keys or backup codes, likely to facilitate account takeover or financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://archism.ru/uplcv?utm_term=electronics+for+guitarists+pdf PDF link annotation
    • http://czyxchem.com/upload/files/79645146532.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/79991755921.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/kipibugixoxenofinemufu.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/sobivorogofefibewujutabej.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/5157313457.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/5534982048.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/logomoziwilek.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/gopofawifaginesi.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///gogomego.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/banazonuj.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/soxiwosuximigibizudulal.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc57f0640a---69497055442.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/77988075532.pdfIn PDF document text
    • https://johanbjerke.se/userfiles/file/binun.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/68672687366.pdfIn PDF document text
    • https://hobbypet.cz/files/file/pineminakitunobu.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/64951778545.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/koposuwatofo.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/fupuvozu.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/96047346917.pdfIn PDF document text
    • https://cmf8.ir/data/file/monemaputep.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_off0000dd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD00 17356 bytes
SHA-256: c7f49d376c367d7466287a1d4b07b3f9ba35674e26503267775c91d1b26bae1d
font_01_sfnt_off000109d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D2 10880 bytes
SHA-256: b73e235db8ccbea42d060e2bbe0e5227e8a5456b6239752f3b0cb85c8bce54c0
font_02_sfnt_off000122e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.