Malicious PDF — malware analysis report

Static analysis result for SHA-256 094014fe80a358c2…

MALICIOUS

PDF

99.4 KB Created: 2021-03-14 21:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5be7fefd6a88bb86246f1f66430a595d SHA-1: 4a03145c1132323305e91d478c321b28b9dd2cbe SHA-256: 094014fe80a358c20a8bb41ab492b99d2b5108c0663ef49a14057ddad91f6489
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these external links. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 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.
  • 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://kuzutuzo.ru/award?keyword=mechanism+of+oxidative+phosphorylation+pdf PDF link annotation
    • https://jabibodusap.weebly.com/uploads/1/3/2/6/132681053/6cb84315f9.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/raxalunu.pdfIn PDF document text
    • https://zivukiwele.weebly.com/uploads/1/3/4/7/134749768/9b9f3e26.pdfIn PDF document text
    • http://fudazozotakaxal.mywebcommunity.org/carbon_cycle_quiz.pdfIn PDF document text
    • https://bizavewes.weebly.com/uploads/1/3/5/3/135323934/3342569.pdfIn PDF document text
    • http://prizyivnik.ru/51253789069aurpz.pdfIn PDF document text
    • https://tugadebijo.weebly.com/uploads/1/3/4/0/134042488/jatarubaxugarazajiza.pdfIn PDF document text
    • https://totidulabi.weebly.com/uploads/1/3/1/6/131606487/jobokadesegi-sirorasural-kapejefab.pdfIn PDF document text
    • http://madamzero.com/toyota_camry_2019_price_in_pakistanq05pe.pdfIn PDF document text
    • http://dududuw.mypressonline.com/what_is_navient_corporation.pdfIn PDF document text
    • https://molulodanewiv.weebly.com/uploads/1/3/1/6/131606256/6344019.pdfIn PDF document text
    • https://tunozuranoba.weebly.com/uploads/1/3/5/3/135316660/35def64.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/business_management_skills_notes.pdfIn PDF document text
    • https://xutepokukofegik.weebly.com/uploads/1/3/5/3/135391302/eb9cd092.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/tigivigezubaxepu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gamelaluwer.myartsonline.com/capper_s_farmer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aa99104-5e76-4537-9f13-f226facfcf1a/17063484333.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/42567377605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5fc15a5-ae88-4b28-859c-1818e253750f/98950987077.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/letra_haz_llover_rey_de_reyes.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/can_i_add_text_to_a_in_adobe_reader.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/what_is_the_purpose_of_the_armor_of_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee9decad-8018-4d6e-b0d8-99ffea6830ab/lakshmi_stotram_english_lyrics.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/what_happens_if_you_lose_your_gold_password_on_ipad.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_off0001465f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1465F 5628 bytes
SHA-256: 7d2a5dd33bab597dd72727f9f9bf897276502618ec83f0fdcf275d38304c74df
font_01_sfnt_off00015979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15979 11088 bytes
SHA-256: dee363592b84262f975e69ae87db355af5bb0f48ec170fcaa3f94c228237c37d