Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d56bf063663693…

MALICIOUS

PDF

73.1 KB Created: 2021-02-17 15:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9df7d34f128d2aba1202643af400166c SHA-1: b7a12d808651902714f213a32d0085c61d5da9bc SHA-256: b4d56bf063663693548fb5e5038a5e0c4bdf1f3a63b5371027ceabb29fcdef03
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=anna%20todd%20book%20series In PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/zikurabisobozes-lekukezamuj-vizafuroxuru-totenufuw.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/melasenurul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_602822bf73f01.pdfIn PDF document text
    • https://cdn.sqhk.co/vilomikov/Rja8phi/command_and_conquer_red_alert_4_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/HRjagKy/ted_bundy_documentary_youtube.pdfIn PDF document text
    • https://rinuvimasajef.weebly.com/uploads/1/3/2/6/132695862/c4ef075.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465545/normal_6009a3f8b3d98.pdfIn PDF document text
    • https://telixezudaridif.weebly.com/uploads/1/3/0/7/130775339/6809606.pdfIn PDF document text
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/ziropewix-rilobati-tewugogafomawe-lurotejafa.pdfIn PDF document text
    • https://viramerobudob.weebly.com/uploads/1/3/1/4/131483281/jupipejeboropen.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/jfkhaH8/tezalulovibuwalu.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/sitozi/peaky_blinders_sad_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/boletin_informativo_ejemplo_de_salud.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/max30100_pulse_oximeter_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/chrome_history_view_free.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_off0000e2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C4 4980 bytes
SHA-256: b0a2eaac17d9c5997de86cb2b4709b60f5f37203a6c0f01f9b0fd746dafd091b
font_01_sfnt_off0000f3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C2 10552 bytes
SHA-256: 887467c1325f262510c89fe1d31adcd1638e9440ab5dbaefa2fe7bf55bd3a3ba