Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a9cc3c807e87ba…

MALICIOUS

PDF

86.6 KB Created: 2021-09-08 20:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34cb4fb32c63214f14a467a2053b95c5 SHA-1: 8682a6ec2a4ad6e3106c8c438dae5334b22d72ca SHA-256: e9a9cc3c807e87baa7720cfd2b5e317619edd2809826add109dd66b44bf58a1c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a likely attempt to host or redirect to malicious content. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/lobogusitomirogusota.pdf
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85626413086.pdf
    • https://castilloexterior.es/ckfinder/userfiles/files/29406878758.pdf
    • http://exmar.it/foto_fck/file/fazuw.pdf
    • http://aaaexpressheating.com/userfiles/file/62838061244.pdf
    • http://fujiya-burbank.com/uploads/files/sifolawisor.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/lmqc0572dtvh4assn60292vt91/gusapevirelekosabe.pdf
    • http://zeci.nl/im/image/85253842423.pdf
    • http://kapalishakti.com/ckfinder/userfiles/files/patuxivadeperen.pdf
    • http://zoekidsworld.com/userfiles/file/nawiwepaxu.pdf
    • https://moolans.com/uploads/files/linuxababeba.pdf
    • http://kjphotocon.org/data/userfiles/files/rologatiwafefowesomu.pdf
    • http://juncheng.tw/upload/files/rutijukisotamupuwo.pdf
    • https://tatsolarlight.com/uploads/files/wegasiwumosuvotavutapumo.pdf
    • http://musicpark-live.de/userfiles/file/91128058644.pdf
    • https://funbugs.ie/userfiles/file/88034600486.pdf
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/dobonuvifisekezifino.pdf
    • http://rigdrilling.org/userfiles/file/59917529830.pdf
    • http://lab4050.com/upload/editor/file/xijelanagurexusimod.pdf
    • http://kerekagy.hu/UserFiles/file/faloxopelunerawuni.pdf
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/63977787091.pdf
    • https://mallncart.com/userfiles/files/14695959960.pdf
    • https://www.ruchya.com.tw/upload/files/fitatomakase.pdf
    • https://aynadakikemalizm.com/resimler/files/sodexonudorikiles.pdf
    • http://tw-tms.com/uploadpic/xw/files/videsozoju.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=2015+jeep+patriot+latitude+4x4+owners+manual
    • 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_off0000e9d5.bin
8b4c9030b4206db3cd210e1854af2f48efbd863597dc3f42b75e6920744f4eee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 11380 bytes
font_01_sfnt_off000104cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104CB 16792 bytes
font_02_sfnt_off00011cdd.bin
d36ebdaedc8e6df1adc4cf21d066668c4e76db0fc96e4125188703a01a1c1203		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDD 18180 bytes

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