Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1663550f861e61…

MALICIOUS

PDF

73.7 KB Created: 2021-03-04 00:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5f26b13ae1840a969724ca3c39cfe3c5 SHA-1: 740a2cc64fe938a8145cadc63b3978f8e9127691 SHA-256: 8d1663550f861e619a0652689c531d5d021c228226fd96d6914c9b8ea42f3ff9
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or scam attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to redirect users to multiple potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/award?keyword=nyssma+level+6+vocal+solos PDF link annotation
    • https://xinagaxigivawiv.weebly.com/uploads/1/3/0/7/130739766/visezojamutefu_wofidow_funisimadeso.pdfIn PDF document text
    • http://monongzhlh.space/spoiler_how_does_defending_jacob_endt6hwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450734/normal_603db7990cff8.pdfIn PDF document text
    • http://mozodulo.iblogger.org/29915999547.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5fcbf594e49ff.pdfIn PDF document text
    • https://nanupiwe.weebly.com/uploads/1/3/1/6/131606486/rokefojetil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421770/normal_5fe3dcf146f0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369307/normal_600287cd82bcc.pdfIn PDF document text
    • http://soldonlittleton.com/vazibunewipesemetipegenunrg1cl.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/hjVnSha/singing_elsa_doll_frozen_2.pdfIn PDF document text
    • https://sugulone.weebly.com/uploads/1/3/2/7/132740418/xusew.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/giggrNo/android_phone_update_app_download.pdfIn PDF document text
    • http://giocodigital.fun/outdoor_gate_keypad_locky7e0r.pdfIn PDF document text
    • http://socialwave.me/1928431901hhwcz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5feaec33abd93.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/haifu4X/scanning_qr_codes_on_android_phones.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/jfJhdif/1457436635.pdfIn PDF document text
    • https://cdn.sqhk.co/wolitobutak/ahjhbBQ/82822706137.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fadedosi/gosezoru.pdfIn PDF document text
    • http://puwagof.rf.gd/97984195028.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/89752764156.pdfIn PDF document text
    • http://bozudob.epizy.com/white_rodgers_1f78_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/vidmate_hd_video_er_for_pc.pdfIn PDF document text
    • http://babivukir.epizy.com/geometry_writing_equations_of_lines_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/meme_music_sheet_music.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_off0000e1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DC 5136 bytes
SHA-256: f5a8bcb31d1d48e2251047b3084179710995d5af00cdd62ddbb4c050fecc4674
font_01_sfnt_off0000f356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF356 10640 bytes
SHA-256: 4f26afa6d1926343e2fbbac6e958cc4540352e49dcf1828903e99ba3f30c872d

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