Malicious PDF — malware analysis report

Static analysis result for SHA-256 96995db028088713…

MALICIOUS

PDF

75.9 KB Created: 2021-03-16 17:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a596cfa5858adef568f95273801765e SHA-1: cbf911870badfbbbd71848692ab09f1d3623f828 SHA-256: 96995db028088713865a420ac596f0ec27c20ef27568866f6a4e59cbd4506b3d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to appear as search results for various terms, including 'delonghi dragon manual'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/wix?keyword=delonghi+dragon+manual
    • https://cdn.sqhk.co/zodavujera/jyZSpYN/ludo_king_game_hack.pdf
    • https://cdn.sqhk.co/pekobenew/hdYjfhh/sewapanikif.pdf
    • https://cdn.sqhk.co/sonorizeluwi/bhiUVeK/99299048912.pdf
    • https://cdn.sqhk.co/vimexuda/fSXaihX/27856280181.pdf
    • https://cdn.sqhk.co/pubusudes/ECphflD/othello_official_board_game_for_free_online.pdf
    • https://cdn.sqhk.co/kelanadu/jWcxfic/crew_nation_application.pdf
    • https://cdn.sqhk.co/muxigatatini/jGjevib/87625024414.pdf
    • https://cdn.sqhk.co/rumobotituda/gieW80K/53206438051.pdf
    • https://cdn.sqhk.co/renonidofel/6AZhhgc/66075199540.pdf
    • https://cdn.sqhk.co/loxexafetivu/lbjaHwc/pexikesodebe.pdf
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/Copyright
    • http://www.typoland.com/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/muxegeza/windows_10_feature_update_1903_size.pdf
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_ae6b89b8cac7469d8b2a32279ae048a5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/130d4d29-bace-4f61-b4d9-981014d3732e/vopajalusudarajufafigepik.pdf
    • https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_b99761167ac54ba191a0bd37f538de7e.pdf?index=true
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_9f523964a5e6448a8907c24f747ca180.pdf?index=true
    • https://s3.amazonaws.com/bisapovepizaj/fikefafirekifotimikav.pdf
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_1ff487290b3f4f868be9923f0f2aa536.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fd1c3607-6dc6-4d2d-b483-9d9adcdf0833/91678926331.pdf
    • https://uploads.strikinglycdn.com/files/ebb8e93e-2126-474e-9ab3-c164acebf1df/76412018262.pdf
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_df3f30540ac04ea09df91abb26a25414.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9e904ff2-e45c-458d-8677-54f4ce98f8d4/english_grammar_books_in_urdu_download.pdf
    • https://uploads.strikinglycdn.com/files/01cdc8f0-ef2c-41a3-9442-c5e72fc5e9cb/soxifupabeligitetiduz.pdf
    • https://uploads.strikinglycdn.com/files/1261eb5d-b24c-4f69-aa7a-6d382324d1f6/2019_lexus_es_300h_ultra_luxury_review.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_off0000d297.bin
de6aacb5a55f55b98bf3ae384f96a51051c900e5a59c241f5198d539ce1a3af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD297 6168 bytes
font_01_sfnt_off0000e237.bin
7363ae45a2d63e611caf0a37378620be92c963a433269d2173e8676a90366162		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE237 5060 bytes
font_02_sfnt_off0000f33e.bin
6715137774d7215d1d155bfe3ca36cb7a9014c66681335e0851bfec352b956e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF33E 15868 bytes

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