Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e94e569a9e9c356…

MALICIOUS

PDF

74.5 KB Created: 2021-03-31 22:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: eca7a9c845fb41b1e8248bde7c1b8010 SHA-1: 56e7c811b033dbc3123a4de510c8d52d3d07c29a SHA-256: 5e94e569a9e9c356f17e68528ce5366e7c8e6a5420eb12bc1c2bb0cdb399794e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. One of these links, https://gimoguvi.ru/123?utm_term=moldable+plastic+sheets, is flagged as an external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through this link farm. No scripts were extracted, but the structure suggests a malicious document intended to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://gimoguvi.ru/123?utm_term=moldable+plastic+sheets PDF link annotation
    • http://tuzupibu.scienceontheweb.net/principles_of_mathematical_analysis_rudin.pdfIn PDF document text
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/bufigoramomigekawo.pdfIn PDF document text
    • http://dowotezovemalo.mygamesonline.org/postpartum_depression_quiz.pdfIn PDF document text
    • https://zavitakeji.weebly.com/uploads/1/3/4/9/134904790/d27616b48f5.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/ap_psychology_exam_2020.pdfIn PDF document text
    • https://suwodofiwimi.weebly.com/uploads/1/3/4/4/134495338/gipimoxuvededaditex.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/vajisukuvetosi.pdfIn PDF document text
    • http://mereritijazos.scienceontheweb.net/carrabba_s_catering.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_f3dc6b3f43e44ab088141c661b71793c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/949641ef-363f-4ad4-b53d-e4d0e62764f5/12903554329.pdfIn PDF document text
    • http://bavatesivo.myartsonline.com/yamaha_keyboard_dgx_505_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/how_many_words_should_my_24_month_old_have.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/lanuresebos.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/76011074338.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/29217205802.pdfIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_ea169c27ff3d49dea3cc895e86040aae.pdf?index=trueIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_1fa6f7b3c9c94c2bb3cd665a7882f7f4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d869d876-0381-4678-b8c3-accd6a0e5ba4/bawipakibasutikumekikibap.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/casein_present_in_different_samples_of_milk.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_off0000e759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE759 5212 bytes
SHA-256: 468e685ffaa00127544f6efe40c9bc0571b7bd9959c1beec2cd14d55f858024d
font_01_sfnt_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 10552 bytes
SHA-256: 780a911be462f109a9ac5466acf5defb57e66090535dfd1349559d4102a6122e

Open this report in the interactive analyzer, or submit your own file for analysis.