Malicious PDF — malware analysis report

Static analysis result for SHA-256 1620f06d55600804…

MALICIOUS

PDF

81.2 KB Created: 2021-03-25 12:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb69bc31d6d812720fc7aaef2e2b2bc1 SHA-1: 83ec3cd8ade54b45839b1578dd2e9d78a9044ef6 SHA-256: 1620f06d55600804a8a7f602d310e19bedcf56e48b995161190358161389edbf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://seumenha.ru/wix?keyword=harry+potter+hogwarts+mystery+mod+apk+download', is presented in a way that mimics a search result, likely to trick users into downloading malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wix?keyword=harry+potter+hogwarts+mystery+mod+apk+download
    • http://fit-italy.space/73320964040nqrsd.pdf
    • http://wacc-cat.org/kinuzafuzevadidoenmim.pdf
    • https://jepuderakemuso.weebly.com/uploads/1/3/4/6/134666912/564f77.pdf
    • http://save50.pro/very_hard_rebus_puzzles_with_answersgkftq.pdf
    • https://cdn.sqhk.co/jarixizotib/fjeigTy/flower_power_garden_centre_near_me.pdf
    • https://losujawidejope.weebly.com/uploads/1/3/4/3/134310111/kofuvu.pdf
    • http://kismykeitio.best/9801424793428d5i.pdf
    • https://cdn.sqhk.co/sukexesi/Vgegfij/36508982896.pdf
    • https://static.s123-cdn-static.com/uploads/4366047/normal_60085f04e7caf.pdf
    • http://mgacessoria.online/pixogezv17d0.pdf
    • https://cdn-cms.f-static.net/uploads/4465709/normal_60481f2c653f5.pdf
    • https://cdn.sqhk.co/goberirud/Kv4ghiE/mukiriwotinixupud.pdf
    • https://waxogisuges.weebly.com/uploads/1/3/0/7/130776632/tulamopafu_nimezikori_likomom_rarulosixofa.pdf
    • https://zewakifu.weebly.com/uploads/1/3/0/7/130740590/7302554.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/pegek/vedebajokite.pdf
    • https://s3.amazonaws.com/wipotegadodorek/dekezuxerebazugi.pdf
    • https://s3.amazonaws.com/pugomonapoxuxe/89489368955.pdf
    • https://s3.amazonaws.com/vabemavuputenif/single_digit_multiplication_worksheets_printable_free.pdf
    • https://s3.amazonaws.com/bejenosugede/26594177286.pdf
    • https://s3.amazonaws.com/vawoginele/attaullah_niazi_video_songs_free.pdf
    • https://s3.amazonaws.com/woberiz/html_css_javascript_for_beginners.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f119.bin
56459e39ab52544cfedf3c33459ffcdb2cc7ca1c8814bb248d1e01b0742d32b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 5332 bytes
font_01_sfnt_off0001032d.bin
4b1b8957294a92bfcc012c0bd147bb52049da189577edb9bc861d431afc3f94e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032D 11280 bytes
font_02_sfnt_off00012971.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12971 4324 bytes

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