Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd63182ea5d869cf…

MALICIOUS

PDF

80.0 KB Created: 2021-03-28 10:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e070f2a912a0c8bf88999345cc3c74c3 SHA-1: dc7d144d4bfdcf4a62cd8e300219e293a56bee57 SHA-256: cd63182ea5d869cf679b7687aa60111ada87e5cf4f0a779e8fe8cdc4a62ddcf6
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its extensive use of external links, characteristic of a link farm or SEO spam tactic. The document body, though heavily obfuscated, contains keywords related to educational worksheets, suggesting a lure to disguise the malicious intent. The presence of numerous external URLs, including those pointing to PDFs with potentially unrelated titles, indicates a high likelihood of redirecting users to malicious sites or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates the embedding of numerous URIs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=punnett+square+practice+problems+worksheet+answers
    • http://zifufarox.getenjoyment.net/ccna_troubleshooting_labs.pdf
    • http://gofofikazujepav.22web.org/ielts_speaking_topics_with_answers.pdf
    • https://cdn.sqhk.co/xonepogafix/YgjmxrP/farmville_2_tropic_escape_hack_apk.pdf
    • http://kigowamukidiba.iblogger.org/e_challan_ahmedabad_app.pdf
    • http://nalodorepuwag.getenjoyment.net/ximile.pdf
    • http://xotujezal.mypressonline.com/vatonubepevetot.pdf
    • https://static.s123-cdn-static.com/uploads/4450427/normal_600626d5d38f5.pdf
    • https://cdn.sqhk.co/vakolitakap/gf0xgXY/memes_wars_2_mod_apk_download.pdf
    • https://cdn.sqhk.co/sowanigog/djgihTo/55305304345.pdf
    • https://cdn-cms.f-static.net/uploads/4374983/normal_602ac0d51a3f6.pdf
    • https://cdn.sqhk.co/ditetona/ifijalp/99185972455.pdf
    • https://cdn.sqhk.co/sikibeve/Jexhh5s/football_manager_2020_best_south_american_wonderkids.pdf
    • https://cdn.sqhk.co/gulanuwe/fQghjL8/cracked_offline_android_games.pdf
    • https://pajegilawemate.weebly.com/uploads/1/3/4/8/134895984/fapajutewakov_papupowovopo_katupemari.pdf
    • https://cdn.sqhk.co/fasisela/cZU19ii/words_with_t_for_toddlers.pdf
    • https://cdn.sqhk.co/vubiwete/ibJgcha/braided_hair_salon_games.pdf
    • https://cdn.sqhk.co/legesizas/jho2wnY/christian_music_with_lyrics_youtube.pdf
    • https://cdn.sqhk.co/gikunixa/rVicjbV/wexetevifutiniwofurejof.pdf
    • https://cdn-cms.f-static.net/uploads/4451028/normal_600b1dbfa09bd.pdf
    • https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/zukigizuzibu.pdf
    • https://joworuzofoluj.weebly.com/uploads/1/3/2/6/132683209/duxisijabivole-relikuluvetut-leripexewadaxeb-firikejujigepu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gozuved.rf.gd/tuxujog.pdf
    • http://novilomarira.rf.gd/movajuleri.pdf
    • http://tibepaxun.rf.gd/physics_textbook_online.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f868.bin
ffc9dd8b0bd97fa285eba1b756f897053cf23237a5640b998c3c47b486d69df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 5596 bytes
font_01_sfnt_off00010b56.bin
510ca90b8b891ad2f0852011d1f8596273dee02262c0da51fca5707ebe6d7332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B56 11504 bytes

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