Malicious PDF — malware analysis report

Static analysis result for SHA-256 8790dd786d7dd523…

MALICIOUS

PDF

73.4 KB Created: 2021-01-23 10:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 60428a3758331cfa97ca5e4000dea244 SHA-1: 9bb6f0af959fe4c82103bdc81a34af878615221a SHA-256: 8790dd786d7dd523625ba4369ac7e3b39107b276f677a1e575fd191eed71451a
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and a heuristic firing for a callback phishing lure, indicating an attempt to trick the user into contacting a malicious entity. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the document's structure and embedded links point towards a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/123?utm_term=frontier+yahoo+email+problems PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457570/normal_5fe04a6a2c187.pdfIn PDF document text
    • http://fokefetebebinin.66ghz.com/vizozokapobokomebupigamo.pdfIn PDF document text
    • http://madusotiju.22web.org/algebra_2_chapter_7_resource_book_answers.pdfIn PDF document text
    • https://site-1168410.mozfiles.com/files/1168410/liu_kang_moves_mortal_kombat_x_xbox_one.pdfIn PDF document text
    • https://site-1171658.mozfiles.com/files/1171658/zirenujov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417534/normal_600341c7ee90f.pdfIn PDF document text
    • https://site-1232713.mozfiles.com/files/1232713/math_multiplication_and_division_worksheets_grade_3.pdfIn PDF document text
    • https://site-1177236.mozfiles.com/files/1177236/mufemusalinupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416786/normal_5fdba22ac9950.pdfIn PDF document text
    • https://site-1171720.mozfiles.com/files/1171720/horror_ghost_sounds_app.pdfIn PDF document text
    • http://kekemubitaf.iblogger.org/cracked_apk_store_ios.pdfIn PDF document text
    • http://javebamugizal.66ghz.com/pyromancer_guide_ds3.pdfIn PDF document text
    • http://gupozatu.22web.org/zuxati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412588/normal_600b4b364afa5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://varaxekewuveza.epizy.com/55749357971.pdfIn PDF document text
    • http://taroxul.epizy.com/molukezu.pdfIn PDF document text
    • http://tosakiviga.rf.gd/whatsapp_for_windows_vista_home_basic.pdfIn PDF document text
    • http://wuxojawe.epizy.com/verorol.pdfIn PDF document text
    • http://paxubar.rf.gd/rpg_maker_mv_games_for_android.pdfIn PDF document text
    • http://natadomemorad.epizy.com/background_hd_pics.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E2 5256 bytes
SHA-256: 01f051cd26223dc39441febb0ef026f6a82310bedf42751d15d50e1ec331ff85
font_01_sfnt_off0000e894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE894 1936 bytes
SHA-256: 84daf345e21b08075a6e329eeacb0a13a0447ddcc3efc64e98a9a4ab9c6a9d9d
font_02_sfnt_off0000f1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 11156 bytes
SHA-256: 276a36cfbd21e21eb999095d2e9dddfe64a7e90b794ccf606476796a3a655054

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