Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4125ce2be1e267…

MALICIOUS

PDF

81.2 KB Created: 2021-03-24 14:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f592d3a9a8b6a063880ebf5f7e6925e5 SHA-1: fd6ba128e1f5002e35351692b403233ce70bc1d3 SHA-256: 0b4125ce2be1e26765fcaf26a55d1bab4ce5be66d06abba0114ea66b7f13bef1
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure, indicating a phishing or redirection attempt. The ML classifier also strongly suggests maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/award?keyword=eduardo+galeano+futbol+sol+y+sombra+pdf In PDF document text
    • http://gajonedorebuko.mywebcommunity.org/13742343256.pdfIn PDF document text
    • https://metidelesaweso.weebly.com/uploads/1/3/0/8/130813592/rusemuvid.pdfIn PDF document text
    • https://zuvumurujibuza.weebly.com/uploads/1/3/0/7/130739557/febekov-xopojoxosunuje-wovenafid-muzevovatob.pdfIn PDF document text
    • http://xamojopilupivo.scienceontheweb.net/60653453654.pdfIn PDF document text
    • https://sexewowoko.weebly.com/uploads/1/3/0/8/130873923/881a81.pdfIn PDF document text
    • https://xizovetezewo.weebly.com/uploads/1/3/2/8/132814166/piwavexujil.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/54709110305.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/d47768ac-eb1f-4d82-a978-f0fed21c6942/plato_the_republic_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0f2638b-2c2a-4d20-a776-da4dc1e03e8d/how_to_use_ocd_pedal.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/analytic_writing_guide_pherson.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/warranty_deed_form_florida.pdfIn PDF document text
    • http://pesetunal.onlinewebshop.net/jekogagonuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad12d3a-b101-430c-82e5-3bfd0b2f5b84/i_am_a_singer_china_2017_ep_2_eng_sub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3837742c-c403-4dcc-86b7-a3df301311b7/the_meaning_of_marriage_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e482d231-b182-4169-88bd-1666f4f09215/nys_dmv_driving_test_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c624a6b1-04ab-4837-b179-02e741576b1d/ratakitowikiwonajejevam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9f0358-9144-4641-b52a-a48865c98d29/witudutetebe.pdfIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/men_without_women_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a48d88-8b67-477b-a66e-9dc6555e237c/2005_dodge_ram_1500_fuel_pump_relay_bypass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/648a91dc-f36c-45c4-ba26-1ed55d93ef95/7472918019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450825fb-38b2-4695-acfd-6ef8c1e51f1b/valiwabijixevalofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2488085-59e6-427e-92d4-091a96441437/xejaganafegavubibotodopu.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_off0000ff7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7F 5560 bytes
SHA-256: 3411ee1e9add9e690630f977a9dabbe780ff10505635274c0988d3689870a49c
font_01_sfnt_off0001125b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125B 10844 bytes
SHA-256: 5df15bf2fb82a4364f76bc5b9816d932f69c02980e546fa38cdb30dac848021b