Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82d43afb030622b…

MALICIOUS

PDF

68.0 KB Created: 2021-09-19 18:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22297e0289015eb61eda05393f75f8af SHA-1: 264251fa9bec414c1a3fee13164cad09d4f9ed05 SHA-256: d82d43afb030622b17e7f00df6641894ff698c6b5bf7a2e56f97cd5cba015eec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous external URIs, including one that appears to be a download link with a 'download keystore android' UTM term, suggesting a lure for malicious software. The PDF's structure and the presence of multiple disposable hosting links further indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=download+keystore+android
    • https://tecnibat.net/uploads/archivos/97310089913.pdf
    • https://dp-engineers.com/admin/userfiles/file/favotidewuwarided.pdf
    • http://dges.in/userfiles/file/22667824006.pdf
    • https://mimpishiosatu.com/contents/files/84321999178.pdf
    • https://tamphuctriland.vn/upload/files/99918929290.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddbc300f59---dagetukol.pdf
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/86773672479.pdf
    • http://lunaleo.pl/userfiles/file/devipul.pdf
    • http://patronusalapitvany.hu/public_html/upload/14524104003.pdf
    • http://jaluzipro.ru/public/userfiles/file/57216122204.pdf
    • http://zamdq.com/filespath/files/20210912055947.pdf
    • http://didopack.com/files/mugunogebomutuwa.pdf
    • https://nhanloc.net/userfiles/file/56602931558.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332b4fd2624---jaxazobo.pdf
    • http://tauroconsulting.pl/userfiles/file/gabuxebafevedexupelopuweb.pdf
    • https://daaeportrett.no/upload/file/kuvoje.pdf
    • http://canyonmeadows.org/userimages/bomuvurebol.pdf
    • http://xingzhongjing.com/userfiles/file/20210918155212_370735973.pdf
    • http://ariogalospspc.lt/userfiles/file/visixodipirafevedakor.pdf
    • http://utpcomp.ru/uploads/files/38598068839.pdf
    • http://trivio.it/userfiles/files/sitaza.pdf
    • http://crestviewshopping.abwingsmd.com/uploads/files/sixukupirager.pdf
    • http://keemunblacktea.cn/uploads/file/021731579582.pdf
    • http://erainbowrealty.com/userfiles/file/jorisifipiruzomixutatizim.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_off0000aeb1.bin
17cf005e6ff43283f83d29553b1766e40bfec6cd90a0c2f696c23d649f7300d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB1 10536 bytes
font_01_sfnt_off0000c6e0.bin
721bc8ffb358973dcb9719841842f2fe035bcbac5809b7bf4cf2677fbd8229f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E0 14228 bytes
font_02_sfnt_off0000ea7a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7A 16792 bytes

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