Malicious PDF — malware analysis report

Static analysis result for SHA-256 36eebc84d0a419ec…

MALICIOUS

PDF

79.6 KB Created: 2021-03-31 08:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82416227c285b6f400404a7981a89f0a SHA-1: 9607bbbc71ad6ed461178ab52ecaafff5cb7de77 SHA-256: 36eebc84d0a419ecb61e28b1614c90ee811203d3074824ed0f0ac85f916358e5
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 of which are to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The primary malicious URL identified is 'https://ponafet.ru/aws?utm_term=diary+wimpy+kid+book+14'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution, aligning with the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/aws?utm_term=diary+wimpy+kid+book+14
    • https://cdn.sqhk.co/xosuridasago/bODjbgi/73371436394.pdf
    • https://cdn.sqhk.co/zedujunuwuxe/aF0JieR/esc_guidelines_nstemi_2017.pdf
    • http://moreprodukti.com/skywalker_10_foot_trampoline_reviews99zdu.pdf
    • http://1fps.ru/business_canvas_exampleoz0q9.pdf
    • https://cdn.sqhk.co/kopilixa/jXigghN/european_history_timeline_1700s.pdf
    • http://vvd.bar/dijixizerorululamg0n0.pdf
    • https://cdn.sqhk.co/pinuwinepasu/Tgejghj/ice_cream_merge_and_split.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_383c1a8b7ccd4cdd8b22429ae9d863ad.pdf?index=true
    • https://s3.amazonaws.com/devuxuzejozam/2018_consumer_reports_cars.pdf
    • https://s3.amazonaws.com/libusamagowuvo/santa_clara_pueblo_v._martinez_summary.pdf
    • https://uploads.strikinglycdn.com/files/c6d8a2f6-6f51-4a73-962a-048597dc045c/does_evening_primrose_induce_labour.pdf
    • https://s3.amazonaws.com/kigavanus/music_video_song.pdf
    • https://uploads.strikinglycdn.com/files/30c834f2-1865-424f-ba67-98b21bde2563/fevugedak.pdf
    • https://s3.amazonaws.com/punagilelabon/human_centipede_3_movie.pdf
    • https://s3.amazonaws.com/ritoma/advanced_custom_fields_repeater_free.pdf
    • https://s3.amazonaws.com/dutimajizowa/awesome_wallpapers_for_desktop_hd_free.pdf
    • https://s3.amazonaws.com/nijosinizo/stock_market_live_stream_yahoo.pdf
    • https://uploads.strikinglycdn.com/files/715305d9-f511-4bee-b48d-414f68902c7c/15848459376.pdf
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_172e49e762504c9db540a0b865ede45c.pdf?index=true
    • https://95a83a18-022f-4aa5-9dc2-588eac4c5c4a.filesusr.com/ugd/ccb6ab_7980fdb8ba074977a99e6a819816cfe9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/32e8f7b0-61d6-409f-b9d8-d7b890ce837c/tipezabexedan.pdf
    • https://s3.amazonaws.com/wibadinavosunom/nizep.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_off0000e8c7.bin
c73e5f8e97777614cc5e3089963c9a27e267289c93d63380a292421d5fba0125		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 4916 bytes
font_01_sfnt_off0000f991.bin
a127dd34c2fcbce17c495a8660897883b95b2ea29303c5d14c3e949097ffe8aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF991 11744 bytes
font_02_sfnt_off00012175.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 4324 bytes

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