Malicious PDF — malware analysis report

Static analysis result for SHA-256 e048ba708b8330eb…

MALICIOUS

PDF

73.6 KB Created: 2021-02-25 00:18:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f74724f45c2370059946c835c814058b SHA-1: 85a9139297ed7a15de72f460b06b2f8cd6173104 SHA-256: e048ba708b8330ebbceeb7e22693f80316ca9ca14fc93f427d69ff7363eb9896
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed and point to other PDF documents, suggesting a link farm or redirection mechanism. The primary URL, https://jottigo.ru/award?keyword=..., appears to be a lure designed to trick users into visiting a malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its structure and embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9182

Heuristics 4

  • 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
  • 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://jottigo.ru/award?keyword=which+type+of+control+chart+to+be+used+for+continuous+data+with+subgroup+size+8
    • https://cdn.sqhk.co/labifikup/ehiUHgi/talking_babsy_baby_apk.pdf
    • http://logowafimu.22web.org/9530276635.pdf
    • https://dowolozudatu.weebly.com/uploads/1/3/4/0/134000293/wakogusa.pdf
    • https://cdn.sqhk.co/girewobo/1jiCLHQ/paypal_customer_service_hours_of_operation.pdf
    • https://cdn.sqhk.co/sejejajoxej/ghgojiR/vibof.pdf
    • https://cdn.sqhk.co/jabuvilir/Zjg8SkF/visual_studio_code_format.pdf
    • https://cdn.sqhk.co/gemadaruvow/fhiWRif/miwoguporosizukeliwebi.pdf
    • https://dunabosugetagek.weebly.com/uploads/1/3/4/6/134601841/1947123.pdf
    • https://motaxajofepox.weebly.com/uploads/1/3/1/3/131381237/093c229889.pdf
    • https://savatevadenu.weebly.com/uploads/1/3/1/4/131452836/8eb3a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ganubifirigevi/65851836407.pdf
    • https://s3.amazonaws.com/sixolose/zakoturisedoxaze.pdf
    • https://s3.amazonaws.com/sukobogixe/bongo_flava_audio.pdf
    • https://s3.amazonaws.com/biwuwukesazef/nba_2018_games_free.pdf
    • http://rodumotafab.rf.gd/wibogutisogixawakagepe.pdf
    • http://vitipazapabixu.epizy.com/boney_m_songs_free_320kbps.pdf
    • https://s3.amazonaws.com/tizowodifi/dugesugegedobe.pdf
    • https://s3.amazonaws.com/bufipevuril/chammak_challo_telugu_movie_song.pdf
    • http://gasiton.rf.gd/lg_wade_organic_chemistry_book.pdf
    • https://s3.amazonaws.com/suzujewa/88254061333.pdf
    • http://meduzifovum.epizy.com/favonanimiw.pdf
    • https://s3.amazonaws.com/vojapu/xagudibumosiwupozer.pdf
    • https://s3.amazonaws.com/senodiw/album_songs_tamil_whatsapp_status_video.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106ed.bin
b4b3704e8138ee210b76b5cabcac087f4a62e521c5aba9ea8396422d160281ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106ED 6008 bytes

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