Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bbee97d5782f44a…

MALICIOUS

PDF

72.5 KB Created: 2021-03-23 07:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9c32076614e20a6872aff5c415fe4b55 SHA-1: aefe179bdb78f02e723a547b5135e108364937ec SHA-256: 6bbee97d5782f44a28f088a96544a7a729976ee43db6a82575668977643e28c5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it contains numerous external URIs, some of which are hosted on disposable domains, suggesting a link farm or phishing lure. The presence of a 'download button' heuristic further supports the attack pattern of tricking users into downloading a payload. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/award?keyword=let+answer+sheet+sample+pdf PDF link annotation
    • http://you-bestshop.xyz/bunudobodimokorisufalut5o2xz.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/soda_stream_gas_exchangesud4f.pdfIn PDF document text
    • http://vsedlyatebya.xyz/adjectives_in_russianbzmgo.pdfIn PDF document text
    • http://goodsun.space/ibanez_gsr200_3_knobsnroxy.pdfIn PDF document text
    • http://hq-cleartv.info/dd_way_of_the_four_elements_revisedfr6uc.pdfIn PDF document text
    • http://help-igcopyright.xyz/84116633333pf9lg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nagajawonusagu.epizy.com/lagu_ost_antara_ada_dan_tiada.pdfIn PDF document text
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_b6505ea24ab244f4b1d0a87952cb39ff.pdf?index=trueIn PDF document text
    • http://jagogapibibolin.epizy.com/jilituzixif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f3dc90f-3f6e-495f-bd4b-1da5d879f331/the_game_awards_winners_2014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4006689d-8f4d-438f-a6bc-42befb59cb19/asimov_foundation_synopsis.pdfIn PDF document text
    • http://zexizel.epizy.com/how_to_use_elgato_hd60_with_ps4.pdfIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_bff9e978a1304e0fbf61af0f61736300.pdf?index=trueIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_d1dc0b4edc824ab180ccc36619755324.pdf?index=trueIn PDF document text
    • http://wojotefeva.rf.gd/45060507899.pdfIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_10d19d7cb9eb43ad8225e5082adf70df.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f6dcf2d-8ee1-4cf5-94d1-953ee87c45b5/zorijukigojaxu.pdfIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_0499dd52c475423b85b7ce0652e2d9db.pdf?index=trueIn PDF document text
    • http://mofapaxuwalix.rf.gd/jaspersoft_ireport_designer_5._1._0.pdfIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_c829ee150e1c49f98c77eb0b109908d0.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDF 5316 bytes
SHA-256: 02633ab6140622fce0fe2dbfe6dcae76b826d320f694c9ccd07582fe77f77ec0
font_01_sfnt_off0000eedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDC 11148 bytes
SHA-256: bc480f8ecad56dc800a6a7e35b59174379e3384350b7183b768582efae9de7ae

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