Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd9ff0ad87949aa…

MALICIOUS

PDF

77.6 KB Created: 2021-01-26 00:28:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b8895b1ddc287677337a9e7d7d6672f0 SHA-1: b7e232cbb053493ad5bc94b9ac3c8f2a1dca3b40 SHA-256: 2fd9ff0ad87949aa0d2c2041116bb17311d4b12de6226ee2dd2a438254db055c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CLICKFIX' heuristic suggests a social engineering attack where the user is prompted to run a command, likely to download and execute a secondary payload. The presence of numerous external URIs, some pointing to disposable hosting, further supports a phishing or malware distribution scheme.

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://jacksth.ru/123?utm_term=ipconfig+media+disconnected+ethernet PDF link annotation
    • http://zemimumaloger.iblogger.org/posefiwijiroro.pdfIn PDF document text
    • http://fesebenawasoz.iblogger.org/irrigation_system_design_an_engineering_approach.pdfIn PDF document text
    • http://kelnoteres.xyz/diep._io_best_tank_for_2_teamsv3icp.pdfIn PDF document text
    • http://klosheff.xyz/brawl_stars_bomberkgpm9.pdfIn PDF document text
    • http://gonzo-3d.com/craftsman_building_craft_2yxxmt.pdfIn PDF document text
    • http://euromarket.pro/wupojeloxaligivoviwuvojemmbpo.pdfIn PDF document text
    • http://edayafar.xyz/janabo3gwwo.pdfIn PDF document text
    • https://cdn.sqhk.co/gatutojuse/cngfjbU/31343694827.pdfIn PDF document text
    • http://zaliv2k20wowowowoow.xyz/smart_balance_wheel_rohs_preciof1yfz.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://mimojududike.epizy.com/browser_android_tv_box.pdfIn PDF document text
    • http://zarazemudaseri.epizy.com/choke_onerepublic_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/devakeveronajo.pdfIn PDF document text
    • http://gametusepezuka.rf.gd/sql_server_format_date_mm_dd_yyyy.pdfIn PDF document text
    • http://tirevotijo.epizy.com/butterfly_effect_2_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/12671053672.pdfIn PDF document text
    • http://sotatelovutegep.epizy.com/california_employee_report_of_injury_form.pdfIn PDF document text
    • http://guvamimifufirar.rf.gd/catholic_rosary_prayers.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/17880656534.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/criminal_case_mod_apk_2._29.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE565 5264 bytes
SHA-256: 4cf94a331f60b46fc82e6514145b46a05fa674f077da3d31131425929f7829dd
font_01_sfnt_off0000f70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70E 10392 bytes
SHA-256: 312c705b9819b292ad52cae85d8f1030675ac3233ae086d5c444b1c8ae3f39c7
font_02_sfnt_off00011aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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