Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5bcd8ea0a12556…

MALICIOUS

PDF

79.2 KB Created: 2021-05-11 15:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a0af87fdf0e59e703931598cd0167477 SHA-1: 5b2e7db3bc6dabf5ba269c76859f9682c13a1742 SHA-256: 6c5bcd8ea0a125561ad1f027c4f4386e0797f969afd3796ec680b20a1cc2e1f3
166 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 0.9994

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/strik?utm_term=what+cleanse+makes+you+lose+weight PDF link annotation
    • https://piworanup.weebly.com/uploads/1/3/2/6/132681558/7207008f2710.pdfIn PDF document text
    • http://ewop.space/the_great_gatsby_characters_quotesldp0p.pdfIn PDF document text
    • http://hackins.site/raminikozunotogevolinipqyncv.pdfIn PDF document text
    • https://cdn.sqhk.co/baxikomo/aiiLNjf/konegofukefarodi.pdfIn PDF document text
    • http://gapekiza.iblogger.org/2017_toyota_camry_xse_v6_0-60.pdfIn PDF document text
    • https://mogarujatokeduw.weebly.com/uploads/1/3/5/3/135324664/tuwowodonudafurim.pdfIn PDF document text
    • https://tizemafuniture.weebly.com/uploads/1/3/4/6/134636649/d761c18a6.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/c93geij/download_race_io_mod_apk_terbaru_2020.pdfIn PDF document text
    • https://sofaruxilo.weebly.com/uploads/1/3/5/3/135309187/9cc80.pdfIn PDF document text
    • https://litalegikuga.weebly.com/uploads/1/3/4/5/134587653/9993291.pdfIn PDF document text
    • http://prosale.company/how_to_put_bobbin_case_in_kenmore_sewing_machineye9bo.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/relafuzumum.pdfIn PDF document text
    • http://snail-case.store/6948017950398nsd.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/BgfBgji/jidetur.pdfIn PDF document text
    • https://togutugu.weebly.com/uploads/1/3/4/6/134617883/puzakeniwitin-lamoxi-bewugawij-lonubotuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tixigidix.epizy.com/how_to_get_hp_deskjet_3630_wifi_password.pdfIn PDF document text
    • http://mejefelutirarej.epizy.com/budget_speech_2020_mauritius.pdfIn PDF document text
    • http://wuxukikaga.rf.gd/alluvial_mining_methods.pdfIn PDF document text
    • http://xopezolesuvobut.rf.gd/abbyy_finereader_10_sprint_free.pdfIn PDF document text
    • http://luvubarebefu.rf.gd/28741966645.pdfIn PDF document text
    • http://sapexamire.rf.gd/asciidoctorj_null.pdfIn PDF document text
    • http://nojupaven.rf.gd/abaddon_2_regular_font.pdfIn PDF document text
    • http://jupunefubepaza.rf.gd/74ls74_d_flip_flop_datasheet.pdfIn 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_off0000f61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61E 5388 bytes
SHA-256: a78c56bba6001230f358a25442c9284f6e354c2aa990224f678a4045fbc0170d
font_01_sfnt_off00010871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10871 10880 bytes
SHA-256: ba8eaf14257cacd31851d6a2c1d2e6c4a3ea209b42e283b94ec17915f1b41e4b

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