Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e34c96532f2bf9…

MALICIOUS

PDF

90.3 KB Created: 2021-05-14 15:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e36252a8615b56431c51671d8dd6413a SHA-1: a65547c23b27eaefaf643156df5187b4dbf6051f SHA-256: 38e34c96532f2bf968d9dab84f89734fe2b70d8102a739b8c1aab412af3b77ea
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 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.
  • 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://seumenha.ru/strik?utm_term=hyderabad+chatal+band+mp3+free+download PDF link annotation
    • https://mesopivupezuna.weebly.com/uploads/1/3/5/3/135311967/tinutulejepodifaja.pdfIn PDF document text
    • http://reduslim-ordina.site/beethoven_piano_concerto_no_3tw0a1.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/ij2ezgj/69336664507.pdfIn PDF document text
    • http://itawegan.fun/formula_racing_2dtx7w1.pdfIn PDF document text
    • https://cdn.sqhk.co/jogujufuza/Wibjijb/odd_eyes_wing_dragon_english.pdfIn PDF document text
    • https://cdn.sqhk.co/tefupudoma/4KhbfTz/aesthetic_tumblr_backgrounds_blue.pdfIn PDF document text
    • http://doctora.club/how_to_reset_f5_code_on_kenmore_washerifm6h.pdfIn PDF document text
    • https://damemebu.weebly.com/uploads/1/3/5/3/135316778/fed56ae27d.pdfIn PDF document text
    • https://muwobifuf.weebly.com/uploads/1/3/4/5/134501600/mavovozo.pdfIn PDF document text
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/rojipezeg_tozunelevudes.pdfIn PDF document text
    • http://ludshop.xyz/tabletop_tiki_hut_instructionsx8frn.pdfIn PDF document text
    • https://jejenovo.weebly.com/uploads/1/3/1/4/131454593/gotaxobezesurafeba.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/jfsgckA/rugigewasowi.pdfIn PDF document text
    • https://cdn.sqhk.co/saturarad/fjhjbPP/zombie_tower_defense_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/120822a1-b69f-4b5e-be74-faf2373c9b6a/54434318565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e33248-cd42-4df8-842a-5ab1568416af/compound_shapes_worksheet_answers_key_7th_grade_math-aids.com.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead85c87-52af-43b9-8cf1-655cbc802be3/ra_salvatore_homeland_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/dilisoroduruva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a5d7a52-ef50-44e7-b781-bab35b4f5e49/vexisudufonokarakazuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/103be29f-4b4b-4eda-91e3-399ddd6eb983/41380758831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9ccb253-bc43-4daa-a043-11a58f6ffcea/where_can_i_find_my_ifit_activation_code.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/91353469552.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/can_excel_online_run_macros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e97525-d472-4204-bf5f-76ab8294b21a/30925401947.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB60 6384 bytes
SHA-256: 25c0bba19f432c36329fcb92034f94dd10b488a4dce69aacc8c0eb5d101bf100
font_01_sfnt_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 5676 bytes
SHA-256: 94c3231465133dc6a6347aaedaf705101cd04e4b5f6bfdace1822cb971283ea6
font_02_sfnt_off00010e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4A 3516 bytes
SHA-256: 2432c62dfd869c7dc474df040fec10373d33dbc0ff586a8f6c12f8249fc25f98
font_03_sfnt_off00011bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF1 11528 bytes
SHA-256: fbe91db5faa1fd98e6a8ee0f687ccd6c2d8d15aaf75cce2e29b599e46d1412e7
font_04_sfnt_off000143a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A5 16080 bytes
SHA-256: 8f6ddafd3b0ce2004b9503adf603897a58143e210ca714e8dcfcba1b249cf112

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