Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fddbea9275c67d…

MALICIOUS

PDF

87.3 KB Created: 2021-03-17 19:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 21cf9effb535dcb050b258c791518e05 SHA-1: 52a4df8d2888fbebe02abfdc1a4334fcea25a1f7 SHA-256: 72fddbea9275c67dffb96f96360a241d1c6bb1ea5bd5b96344b889a136b864eb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=auditoria+forense+en+colombia+pdf PDF link annotation
    • http://swiss-gear.store/mekaxelutomujitgk72.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/dheifih/timiladof.pdfIn PDF document text
    • http://fortuneo.biz/0_36_months_developmental_milestones0w27q.pdfIn PDF document text
    • http://takefeduw.iblogger.org/ms_word_for_macbook_air_free.pdfIn PDF document text
    • http://tujodugugejime.22web.org/tekatalekojalulojifejo.pdfIn PDF document text
    • http://cocobuka3.xyz/67168100414pxmbg.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/hgvjfzR/72684079963.pdfIn PDF document text
    • http://theandyhong.com/romafolqlxtf.pdfIn PDF document text
    • http://hushseo.online/fizizozexalur68gbr.pdfIn PDF document text
    • http://totalcreditcheck.info/multiplication_tables_from_1_to_30_free_download03sya.pdfIn PDF document text
    • http://lordtrans.ru/how_to_build_a_4_way_splitter_wedgepk5vy.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/dgfjijd/crazy_ball_3d_facebook_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/ijijyjj/subway_surfers_characters_dates_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/eOjgYhh/music_quiz_guess_pop_song_90s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://baxazujokeranu.epizy.com/16387027188.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_52b56bd1dd604168aeb35b4c158cf95c.pdf?index=trueIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_402b46b2b7be41b4a5cee77d76273b9c.pdf?index=trueIn PDF document text
    • http://defixudopa.rf.gd/79433682252.pdfIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_b0046b78f51f4a4a9d7d37565359646f.pdf?index=trueIn PDF document text
    • http://kudogal.rf.gd/5464814649.pdfIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_56f7556204194efc91e1bac3de8134cf.pdf?index=trueIn PDF document text
    • https://4f7f339c-9ee9-4921-a7ad-794169edd555.filesusr.com/ugd/fea72b_27f19b6c17d64c52a2e08dc567fe3872.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2E 2828 bytes
SHA-256: eec2311198495a4bc353016469730966835d49679daeed18a98faa9ab15954d4
font_01_sfnt_off00010638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10638 5312 bytes
SHA-256: 3dab125b4cb8768acadcdba3f26b5cf5ded1f0c0eec3eaa7f9f05fee7fa14c7f
font_02_sfnt_off00011820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11820 12128 bytes
SHA-256: ea99f77c9a52a6b1213351cc6886d0380540e2ee0e3d8945da7f6f86ed814129
font_03_sfnt_off00013fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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